NASA Acronyms - Full List
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A	ampere
A	analog
A	analog signal
A&A	advertise and award
A&CO	activation and checkout
A&COTA	assembly and checkout technical analysis
A&E	architects and engineers
A&E	architectural and engineering
A&L	approach and landing
A&P	airframe and power plant
A&P	attitude and pointing
A&PS	Administration and Program Support (MSFC directorate)
A&R	assembly and recycle
A&R	automation and robotics
A&RC	application and resource control
A&S	alignment and stabilization
A&SS	alignment and stabilization subsystem
A&T	assembly and test
A&TA	assembly and test area
A-G	air-to-ground
A/A	air-to-air

A/A	airplane avionics
A/A	analog-to-analog
A/A	angular accelerometer
A/B	airborne
A/C	air conditioning
A/C	aircraft
A/C	associate contractor
A/D	analog-to-digital
A/F	air-to-fuel ratio
A/F	airframe
A/FM	arm firing mechanism
A/G	air-to-ground
A/J	antijam
A/L	airlock
A/L	approach and landing
A/L	autoland
A/M	area to mass
A/M	auto/manual
A/N	account name
A/N	alphanumeric
A/O	analog output

A/P	airport
A/P	autopilot
A/R	as required
A/R	autoland roll-out
A/S	acquisition sensor
A/S	airspeed
A/S	arm/safe
A/S	ascent stage
A/S	auxiliary stage
AA	accelerated assembly
AA	associate administrator
AA	accelerometer assembly
AA	affirmative action
AA	air-to-air
AA	airplane avionics
AA	American Airlines
AA	angular accelerometer
AA	antiaircraft
AA	Associate of Arts degree
AA/AL	airplane avionics/autoland
AA/AL	automatic approach/autoland

AAA	allocations, assessments, and analysis
AAA	astronaut-actuated abort
AABNCP	Advanced Airborne National Command Post
AACCS	analytical approach to candidate constellation selection
AACPSM	actual average cost per successful mission
AACS	attitude and antenna control system
AADEW	attack assessment for directed-energy weapon
AADR	applications approval design review
AADS	ascent air data system
AADSF	advanced automated directional solidification furnace
AAE	abort advisory equipment
AAE	aerospace auxiliary equipment
AAE	American Association of Engineers
AAFE	advanced applications flight equipment
AAIR	advanced atmospheric sounder and imaging radiometer
AAMP	advanced architecture microprocessor
AAMRAM	air-to-air medium-range missile
AAO	Astronaut Activities Office (JSC)
AAP	Affirmative Action Plan
AAP	Affirmative Action Program
AAP	airlock adapter plate

AAP	analog autopilot
AAP	assemble at pad
AAS	abort advisory system
AAS	advanced antenna system
AASM	Association of American Steel Manufacturers
AB	adapter booster
AB	afterburner
AB	air bearing
AB	airborne
AB	anchor bolt
AB	autobeacon
AB	avionics bay
ABA	dc amplifier, buffer, and attenuator
ABC	Ada browse capability
ABC	automatic brightness control
ABCAS	algorithm beam center and shape
ABCF	as-built configuration file
ABCL	as-built configuration list
ABCP	airborne command post
ABCR	as-built configuration record
ABD	Airborne Ballistics Division (NASA)

ABE	air-based electronics
ABE	air-breathing engine
ABE	arm-based electronics
ABERT	auto bit error rate test
ABES	air-breathing engine system
ABETS	airborne beacon test set
ABI	avionics bus interface
ABJIT	algorithm beam jitter
ABL	airborne laser
ABL	aircraft-based laser
ABLE	airborne laser evaluation
ABLOS	algorithm beam line of sight
ABM	acquisition bus monitor
ABM	advance bill of materials
ABM	antiballistic missile
ABM	apogee boost motor
ABMA	Army Ballistic Missile Agency
ABMCP	airborne military command post
ABMO	Antiballistic Missile Office
ABNCP	Airborne National Command Post
ABPS	air-breathing propulsion system

ABRES	antiballistic reentry system
ABS	air-break switch
ABS	ammonia boiler system (subsystem)
ABT	air-bearing table
ABTCU	active baseplate thermal control unit
AC	advanced composite
AC	aerodynamic center
AC	application controller
AC	assembly complete
AC	audio center
AC	auxiliary computer
ACA	altitude controller assembly
ACA	annunciator control assembly
ACA	Associate Contractor Administration
ACA	attitude controller assembly
ACA	auxiliary crew compartment
ACAP	Advanced Computer Airframe Program
ACB	air-cushion barge
ACC	advanced carbon-carbon
ACC	aft cargo compartment
ACC	automatic control console

ACC	auxiliary crew compartment
ACCE	augmented continuous control evaluator
ACCESS	assembly concept for construction of erectable space
ACCN	audit central control network
ACCS	adaptive communication control subsystem
ACCU	audio central control unit
ACD	accuracy control document
ACD	anti-carryover device
ACD	architectural control document
ACDA	Arms Control and Disarmament Agency
ACDNS	attitude control, determination, and navigation
ACDS	attitude control and determination system (subsystem)
ACE	acceptance checkout equipment
ACE	actual average cost per successful mission
ACE	attitude control electronics
ACE	automatic checkout equipment
ACEL	Air Crew Equipment Laboratory (U.S. Navy)
ACES	acceptance checkout and evaluation system
ACES	acceptance control equipment section
ACES	automatic checkout equipment sequencer
ACEU	aerocontrol electronics unit

ACF	American Car and Foundry
ACI	age-controlled item
ACI	allocated configuration identification
ACIL	automatic controlled instrument landing
ACIP	aerodynamic coefficient identification package
ACIP	aerodynamic coefficient instrumentation package
ACL	access control list
ACL	allowable container load
ACL	ascent closed loop
ACLC	adaptive communication live controller
ACLS	automated control and landing system
ACM	acquisition control module
ACM	actual average cost per successful mission
ACM	Association of Computing Machinery
ACM	auxiliary core memory
ACMA	Army class managing activity
ACMB	Applications Configuration Management Board
ACME	attitude control and maneuvering electronics
ACMS	automated configuration management system
ACN	acceptance change notice
ACN	Ascension Island (STDN)

ACO	acceptance checkout
ACO	administrative contracting officer
ACO	assembly checkout
ACP	airborne command post
ACP	astronaut control panel
ACP	audio control panel
ACPL	assembly component parts list
ACPM	associate contractor program manager
ACPM	attitude control propulsion motor
ACPO	Associate Contractor Project Office
ACPS	attitude control propulsion system
ACR	actual cost report
ACRC	assured crew return capability
ACRES	automated change request and evaluation system
ACRIM	active cavity radiometer irradiance monitor
ACRS	accelerated cost recovery system
ACRS	Advisory Committee on Reactor Safeguards
ACRV	assured crew return vehicle
ACS	advanced combat system
ACS	aft crew station
ACS	alternating current synchronous

ACS	altitude control and stabilization
ACS	American Chemical Society
ACS	atmosphere control system
ACS	attitude control and stabilization
ACS	attitude control system
ACS	automated control system
ACSN	advance change schedule notice
ACSN	advance change/study notice
ACSU	alternating-current switching unit
ACT	acquisition coarse tracker
ACT	acquisition, control, and test
ACT	audio center transmission
ACTA	activate test article
ACTS	acquisition coarse tracker subsystem
ACTS	advanced communication technology satellite
ACU	annunciator control unit
ACU	avionics cooling unit
ACUO	avionics cooling unit operator
ACV	air-cushion vehicle
ACWP	actual cost for work performed
AD	Administrative Operations and Support Service (KSC

AD	advanced development
AD	air density
AD	associate director
ADA	adaptive diagnostic authoring
ADA	azimuth drive assembly
ADABECS	airborne demonstration advanced beam extraction am
ADAC	attitude determination and control
ADACS	attitude determination and control system
ADADL	Ada design and documentation language
ADAES	advanced data assessment expert system
ADAM	automated distributed architecture model
ADAMS	automated dynamic analysis of mechanical systems
ADAP	aerodynamic data analysis program
ADAP	automated data analysis program
ADB	Aerodynamic Data Book
ADB	auxiliary memory data output bus
ADC	Aerospace Defense Command
ADC	Air Defense Command
ADC	air data computer
ADC	analog-to-digital computer
ADC	analog-to-digital converter

ADC	attitude determination and control
ADCN	attitude determination, control, and navigation
ADCOM	air defense command
ADCR	applicable document contractual record
ADCS	attitude determinate control system
ADCS	attitude determination and control subsystem
ADD	architecture definition document
ADF	automatic direction finder
ADF	automatic display finder
ADFRF	Ames/Dryden Flight Research Facility
ADH	advanced development hardware
ADI	analytic and design investigation
ADI	attitude direction indicator
ADI	attitude director indicator
ADI	attitude display indicator
ADIC	Air Defense Intelligence Center
ADL	Ada design language
ADL	Ada-based design language
ADL	Advanced Development Laboratory
ADL	Avionics Development Laboratory
ADM	air data management

ADMS	automated data management system
ADOP	advanced distributed on-board processor
ADP	acceptance data package
ADP	acceptance documentation package
ADP	Advanced Development Program (NASA)
ADP	air data package
ADP	air data probe
ADP	automated data processing
ADP	automatic data processing
ADPA	air data probe assembly
ADPE	automated data processing equipment
ADPE	automatic data processing equipment
ADPF	automated data processing facility
ADPL	as-designed parts list
ADPS	acceptance data package system
ADPSSM	ADP system security monitor
ADR	Aerospace and Defense Research
ADRL	automatic drawing release list
ADS	air data sensor
ADS	air data system (subsystem)
ADS	angular displacement sensor

ADS	ascent design system
ADS	attitude determination subsystem
ADS	attitude display system
ADS	audio distribution system
ADSA	alternate demonstration structural article
ADSF	automatic directional solidification furnace
ADT	air data transfer
ADTA	air data transducer assembly
ADU	annunciator display unit
ADU	ascent driver unit
AE	architectural and engineering
AEB	aft equipment bay
AEC	aft end cone
AEC	aft events controller
AEC	American Engineering Council
AEC	Atomic Energy Commission
AECS	area entry control system
AECS	automated entry control system
AED	Aerospace Electrical Division (Westinghouse)
AED	analog event distributor
AEDC	Arnold Engineering Development Center

AEDS	analog event distribution system
AEM	acoustical emission monitoring
AEM	arsenal exchange model
AEM	assembly and external maintenance
AEOP	adaptive electro-optical processor
AER	Atomic Energy Research
AERO	Aeroballistics (MSFC)
AES	advanced electrical schematic
AES	American Electrochemical Society
AES	American Electroplaters Society
AES	analog event system
AES	atmosphere exchange system
AES	Auger electron spectroscopy
AESOP	an easy system of programming
AET	aerosurface end-to-end test
AET	algorithm evaluation and test
AETB	alumina-enhanced thermal barrier
AETL	approved engineering test laboratory
AF	aft fuselage
AF	Air Force
AF	airframe

AF	audio frequency
AF	award fee
AF/DBS	areal fluid data base system
AF/IN	Air Force/Intelligence
AFA	airframe assembly
AFA	American Foundrymen's Association
AFAD	armed forces acquisition document
AFAL	Air Force Astronautics Laboratory
AFAL	Air Force Avionics Laboratory
AFALD	Air Force Acquisition Logistics Division (WPAFB)
AFAPL	Air Force Aero Propulsion Laboratory
AFATL	Air Force Armaments Test Laboratory
AFB	Air Force base
AFBMA	Antifriction Bearing Manufacturing Association
AFBMD	Air Force Ballistic Missile Division
AFC	aerodynamic flight control
AFC	automatic flight control
AFC	automatic frequency control
AFCS	automatic flight control system
AFCSC	Air Force Cryptologic Support Center
AFD	acceptance for data

AFD	aft flight deck
AFD	assistant flight director
AFDE	aft flight deck equipment
AFDO	aft flight deck operator
AFDR	ascent flight design review
AFE	Aeroassist Flight Experiment
AFEB	Award Fee Evaluation Board
AFEC	Award Fee Evaluation Committee
AFESD	Air Force Electronic Systems Division
AFETR	Air Force Eastern Test Range
AFETRM	Air Force Eastern Test Range Manual
AFEV	Air Force experiment vehicle
AFF	acceptance and ferry flight
AFFDL	Air Force Flight Dynamics Laboratory
AFFTC	Air Force Flight Test Center (EAFB)
AFFTC/RPL	Air Force Flight Test Center/Rocket Propulsion
AFGE	American Federation of Government Employees
AFGL	Air Force Geophysics Laboratory
AFGWC	Air Force Global Weather Center
AFI	automatic fault isolation
AFLC	Air Force Logistics Command

AFM	Air Force manual
AFM	arm/firing mechanism
AFMDC	Air Force Missile Development Center
AFML	Air Force Materials Laboratory
AFMTC	Air Force Missile Test Center
AFO	abort from orbit
AFO	announced flight opportunity
AFOSH	Air Force Occupational Safety and Health
AFOTEC	Air Force Operational Test and Evaluation Center
AFP	advanced flexible processor
AFP	Air Force plant
AFP	Ariane-furnished property
AFP888	designation for P80-1 spacecraft
AFPC	Air Force Program Control
AFPD	authorization for program development
AFPM	Air Force program manager
AFPR	Air Force plant representative
AFR	Air Force regulation
AFRPL	Air Force Rocket Propulsion Laboratory (EAFB)
AFRSI	advanced flexible reusable surface insulation
AFS	Air Force standard

AFS	Air Force station
AFS	ascent flight system
AFSA	Air Force study and analysis
AFSAT	Air Force satellite
AFSATCOM	Air Force satellite communication(s)
AFSC	Air Force Space Command
AFSC	Air Force specialty code
AFSC	Air Force Systems Command
AFSCF	Air Force Satellite Control Facility
AFSCF	Air Force Space Command Facility
AFSCF	Air Force Systems Command Facility
AFSCN	Air Force satellite control network
AFSCN	Air Force Space Command network
AFSCS	Air Force satellite communications system
AFSD	Air Force Space Division
AFSIE	Air Force standard items and equipment
AFSIG	Ascent Flight System Integration Group
AFSLV	Air Force space launch vehicle
AFSPACECOM	Air Force Space Command
AFSRT	avionics flight systems readiness test
AFSSD	Air Force Space Systems Division

AFSTC	Air Force Satellite Test Center
AFSTC	Air Force Space Technology Center
AFSTC	Air Force Space Technology Command
AFSWC	Air Force Special Weapons Center (Holloman AFB)
AFT	active fine tracker
AFT	aerodynamic flight test
AFT	atmospheric flight test
AFTA	acoustic fatigue test article
AFTA	aft frame tilt actuator
AFTEC	Air Force Test and Evaluation Center
AFTOC	Air Force Tactical Operations Center
AFTP	Air Force test procedure
AFTS	aft fuselage thrust structure
AFWAL	Air Force Weapons Analysis Laboratory
AFWAL	Air Force Wright Aeronautical Laboratory
AFWAL/ML	Air Force Wright Aeronautical Lals Laboratory
AFWL	Air Force Weapons Laboratory
AFWPAL	Air Force Wright-Patterson Aeropropulsion Laboratory
AFWSG	Air Force Weapons System Group
AFWTR	Air Force Western Test Range
AG	artificial gravity

AG	attitude gyro
AGAA	attitude gyro accelerometer assembly
AGAP	attitude gyro accelerometer package
AGARD	Advisory Group for Aeronautical Research and Development
AGC	Aerojet General Corporation
AGC	automatic gain control
AGCA	automatic ground-controlled approach
AGCS	automatic ground control station
AGCU	air/ground cooling unit
AGCU	attitude gyro coupling unit
AGE	aerospace ground equipment
AGE	air/ground equipment
AGE	automatic ground equipment
AGI	agreement item
AGL	above ground level
AGL	above-ground link
AGL	absolute ground level
AGMA	American Gear Manufacturer's Association
AGMC	Aerospace Guidance and Metrology Center
AGN&C	advanced guidance, navigation, and control
AGO	Santiago, Chile (STDN)

AGOES	advanced geosynchronous observation environment
AGOSS	automated ground operations scheduling system (KSC)
AGREE	Advisory Group in Reliability of Electronic Equipment
AGS	abort guidance system
AGS	antigravity suit
AGS	ASPS gimbal system
AGT	adaptive guidance throttling
AH	ampere hour
AH	attitude hold
AHCS	advanced helicopter control system
AHI	artificial horizon indicator
AHM	automatic hold mode
AHP	analytical hierarchy process
AHP	pitch axis attitude hold
AHR	ablative heat rate
AHR	roll axis attitude hold
AHRS	attitude heading reference system
AHS	aft heat shield
AI	action item
AI	airspeed indicator
AI	altimeter indicator

AI	altitude indicator
AI	anti-icing
AI	artificial intelligence
AI	associate investigator
AI/ES	artificial intelligence/expert system
AIA	Aircraft Industries Association
AIAA	American Institute of Aeronautics and Astronautics
AICBM	anti-ICBM
AICC	action item control card
AICE	American Institute of Chemical Engineers
AICP	aerodynamic instrumental coefficient package
AICS	action item closeout sheet
AID	abbreviated item description
AID	action item disposition
AID	analog input differential
AID	audit item disposition
AIDE	aerospace installation diagnostic equipment
AIDS	airborne integrated data system (subsystem)
AIEE	American Institute of Electrical Engineers
AIIM	Association for Information and Image Management
AIL	Avionics Integration Laboratories

AILAS	automatic instrument landing approach system
AILS	automatic instrument landing system
AIM	automatic information management
AIME	American Institute of Mechanical Engineers
AIOD	ascent insertion on-orbit deorbit
AIP	aircraft instrumented payload
AIP	avionics integration plan
AIR	action item report
AIR	adaptive intercommunication requirement
AIS	action item sheet
AIS	airborne imaging spectrometer
AIS	airlock illumination subassembly
AIS	analog-in single-ended
AISC	American Institute of Steel Construction
AISD	Autonetics ICBM Systems Division (Rockwell)
AISI	American Iron and Steel Institute
AIST	abbreviated integration system test
AIST	advanced interferometric system technology
AIST	Agency of Industrial Science and Technology
AISTR	advanced interferometric system technology requirement
AIT	autoignition test

AIU	abort interface unit
AIU	avionics interface unit
AJ	antijamming
AJ	assembly jig
AJCS	automated job card system
AKA	active keel actuator
AKM	apogee kick motor
AL	airlock
AL	approach and landing
AL	autoland
ALAS	approach/landing autopilot subsystem
ALASAT	air-launched antisatellite
ALASS	alternate low-altitude surveillance system
ALB	acceptance log book
ALC	aft load controller
ALC	air logistics center
ALC	audio load compensator
ALC	automatic level control
ALC	automatic light control
ALCA	aft load controller assembly
ALCA	automatic level-control assembly

ALCC	Airborne Launch Control Center
ALCM	air-launched cruise missile
ALCOA	Aluminum Corporation of America
ALCOM	algorithm line-of-sight comparison
ALDC	automatic load and drive control
ALDO	activity-level-dependent operation
ALE	Airborne Laser Experiment
ALE	airport lighting equipment
ALERT	acute launch emergency reliability tip
ALERT	acute launch emergency restraint tip
ALFA	air-lubricated free attitude
ALFT	approach and landing flight test
ALGOL	algorithmic language
ALIO	activity-level-independent operation
ALL	Airborne Laser Laboratory
ALMS	automated logistics management system
ALOSA	algorithm line-of-sight angle
ALPS	advanced liquid propulsion system
ALPS	approach and landing procedures simulator
ALRC	Aerojet Liquid Rocket Company
ALRUTS	automated line replaceable unit tracking system (KSC)

ALS	Ada language system
ALS	advanced launch system
ALS	advanced logistics system
ALS	airlock system
ALS	alternative landing site
ALS	approach/landing system
ALS	automatic landing system
ALSA	astronaut life support assembly
ALSE	astronaut life support equipment
ALSEMP	ALS Engineering Management Plan
ALSGEM	ALS global evaluation module
ALSS	advanced life support system
ALSS	airlock support system (subsystem)
ALSSSWG	ALS System Security Working Group
ALSSW	ALS software
ALSYM	ALS model
ALT	approach and landing test
ALTR	approach and landing test requirement
ALTS	avionics LRU tracking system
ALU	arithmetic/logic unit
ALV	advanced launch vehicle

ALV	advanced logistics vehicle
ALVIB	algorithm payload vibration
AM	actuator mechanism
AM	Administration and Management Operations (KSC
AM	aeromedical monitor
AM	airlock module
AM	alpha meter
AM	amplitude modulated
AM	amplitude modulation
AM	antenna management
AM	assurance management
AMAL	Aeronautical Medical Acceleration Laboratory
AMAL	Aviation Medical Acceleration Laboratory
AMBD	automated maintenance data base
AMC	aft motor controller
AMC	Air Material Command
AMC	Army Missile Command
AMC	automatic manual control
AMC	automatic mixture control
AMCA	aft motor controller assembly
AMCC	ADL master control console

AMCM	advanced missions cost model
AMCR	automated master change record
AMDCS	assurance management document control system
AMDS	advanced missions docking system (subsystem)
AME	abort maneuver evaluator
AMEC	aft master events controller
AMEU	alpha/Mach indicator electronic unit
AMF	abort motor facility
AMF	apogee memory image
AMFL	Aeromedical Field Laboratory
AMG	Activation Management Group
AMG	angle of the middle gimbal
AMI	airspeed/Mach indicator
AMI	alpha/Mach indicator
AMI	apogee memory image
AMIC	Automated Management Information Center
AMIS	acquisition management information system
AMK	aircraft modification kit
AML	approved materials list
AMLC	asynchronous multiline controller
AMLS	advanced manned launch system

AMMM	autonomous magnetic momentum management
AMO	Aerospace Medical Operations (JSC)
AMOOS	advanced maneuvering orbit-to-orbit Shuttle
AMOS	Air Force Maui optical site
AMPD	Applied Materials Physics Division
AMPR	aeronautical manufacturer's planning report
AMPR	aeronautical manufacturer's progress report
AMPS	atmosphere, magnetosphere, and plasmas in space
AMPS	atmospheric magnetospheric plasma system
AMPTE	active magnetospheric particle tracer explorer
AMR	area-to-mass ratio
AMR	Atlantic Missile Range
AMRF	Automated Manufacturing Research Facility
AMRO	AMR operations
AMRV	astronaut maneuvering vehicle
AMS	acoustic measurement system
AMS	actuation mechanism subsystem
AMS	aeronautical material specification
AMS	amplifier subsystem
AMS	attached manipulator system
AMS	automated material system

AMS	automated measurement system
AMSC	advanced military space flight capability
AMSD	Autonetics Marine Systems Division
AMST	advanced medium STOL transport
AMT	auxiliary master tape
AMTAS	automatic modal tuning and analysis system
AMTD	automatic magnetic tape dissemination
AMTF	Acoustic Model test Facility
AMU	astronaut maneuvering unit
AMU	attitude match update
AMW	angular momentum wheel
AMX	AM transmitter-receiver
AMY	Ada management yield
AN	alphanumeric
AN	Army-Navy
ANA	Air Force-Navy aeronautical bulletin
ANARS	autonomous navigation and attitude reference system
ANC	active nutation control
ANC	Air Force-Navy-civil
AND	Air Force-Navy aeronautical design standard
AND	Air Force-Navy design

ANI	authorized, not implemented
ANL	automatic noise limiter
ANMCC	Alternate National Military Command Center
ANRA	air navigation radio aid
ANSI	American National Standards Institute
ANT	Antigua (ETR)
ANT	Antigua Island
ANVIL	CAD tool
AO	acoustic-optical
AO	analog output
AO	announcement of opportunity
AOA	abort once around
AOA	airborne optical adjunct
AOA	American Ordnance Association
AOA	angle of attack
AOC	annual operating cost
AOC	auxiliary output chip
AOCP	ac on-board computer program
AOCP	AVCS on-board computer program
AOCRD	acceptance and operational checkout requirements
AOCS	attitude and orbit control subsystem

AOD	advanced object data
AOD	Aircraft Operations Division (JSC)
AOD	analog output differential
AOD	assistant operations director
AOES	advanced orbit ephemeris system
AOFEE	advanced orbiter flight evaluation experiment
AOI	area of interest
AOIS	automatic optical inspection system
AOL	area of launch
AOM	acoustic-optic modulator
AOP	annual operating plan
AOP	assembly operations plan
AOPL	advance order parts list
AOPM	airline operations planning model
AOQ	average outgoing quality
AOQL	average outgoing quality limit
AOS	acquisition of signal
AOS	ACTS optical system
AOS	airborne optical system
AOSP	advanced on-board signal processor
AOT	actual operating time

AOT	alignment optical telescope
AOT	avionics operating time
AOT	avionics overall test
AP	accelerometer package
AP	access panel
AP	access point
AP	administrative procedure
AP	air pressure
AP	atmospheric and space physics
AP	autopilot
AP	Procurement, Supply, and Transportation (KSC
AP&P	advanced plans and programs
APA	abort programmer assembly
APA	allowance for program adjustment
APAE	attached payload accommodations equipment
APAS	Aerodynamic Performance and Sizing Program
APC	adaptive payload carrier
APC	advanced propulsion comparison
APC	aft power controller
APC	airborne particle counter
APC	armored personnel carrier

APC	automatic phase control
APCA	aft power controller assembly
APCP	Aerojet photoelectric cell program
APD	area passive dosimeter
APD	avalanche photo diode
APDL	Ada programming design language
APE	arithmetic processing extension
APES	advanced processor emulator system
APGC	Air Proving Ground Command
API	air position indicator
APIF	automated process information file
APIRD	authorized procurement information requirements
APIRL	authorized procurement information requirements list
APK	accelerometer package
APL	applications program library
APLAC	analysis program linear active circuit
APLIS	automated payload ICD system
APLM	applications program library maintenance
APM	ascent particle monitor
APM	assistant project manager
APM	associate program manager

APMSM	assembly phase maintenance simulation model
APN	ACE problem notice
APO	automated purchase order
APP	advance procurement package
APP	astrophysics payload
APPF	Automated Payload Processing Facility
APPLE	advanced propulsion payload effect
APPS	auxiliary payload power system
APR	advance parts release
APRF	Army Pulse Radiation Facility
APS	aft propulsion system (subsystem)
APS	ascent propulsion system
APS	attitude propulsion system (subsystem)
APS	automated planning system
APS	automatic processing system
APS	auxiliary power subsystem
APS	auxiliary propulsion system
APSAP	auxiliary propulsion system aft pod
APSE	Ada programming support environment
APSS	atmospheric pressure supply subsystem
APT	airborne pointer tracker

APT	astronaut preference test
APT	automatic programmed tool
APTE	automated production test equipment
APTI	actions per time interval
APU	auxiliary power unit
APU	auxiliary propulsion unit
APUS	auxiliary power unit subsystem
APUT	auxiliary power unit test
APWL	automatically processed wire list
AQL	acceptance quality level
AR	acceptance readiness
AR	acceptance review
AR	acid resisting
AR	antireflection
AR	antireflective
AR	as required
AR	atmospheric revitalization
ARA	attitude reference assembly
ARA	auxiliary recovery antenna
ARABSAT	Saudi Arabian communications satellite
ARAP	Aeronautical Research Associates of Princeton

ARAP	astronaut rescue air pack
ARAR	accident risk assessment report
ARC	aggregation of red blood cells
ARC	Ames Research Center (NASA, Moffet Field, California)
ARC	automatic responsivity correction
ARCOMSAT	Arab League communications satellite
ARCS	aft reaction control subsystem
ARD	abort region determinator
ARDC	Air Research and Development Command (Air Force)
ARES	advanced railroad electronic system
ARFDS	automatic reentry flight dynamics simulator
ARGMA	Army Rocket and Guided Missile Agency
ARIA	advanced range instrumentation aircraft
ARIES	astronomical radio interferometric Earth surveying
ARINC	Aircraft Radio, Incorporated
ARIS	advanced range instrumentation ship
ARIS	ALS requirements information system
ARMA	accumulator-reservoir manifold assembly
ARMS	automated requirements management system
ARN	action and reply notice
ARN	additional reference number

ARP	as-run procedure
ARPA	Advanced Research Projects Agency (DOD)
ARPCS	atmosphere revitalization pressure control system
ARPCS	atmospheric revitalization pressure control system
ARPESH	accurate and reliable prototype Earth sensor head
ARQ	automatic request
ARRS	air recovery and rescue service
ARS	Air Rescue Service
ARS	air revitalization system (subsystem)
ARS	ALS release system
ARS	American Rocket Society
ARS	atmosphere revitalization subsystem
ARS	atmospheric revitalization section
ARS	atmospheric revitalization system
ARS	attitude reference system
ARSDA	advanced radiation space defense application
ART	automated reasoning tool
ARTCC	air route traffic control center
ARTO	Advanced Radiation Technology Office
ARTOOS	Advanced Radiation Technology Office optical support
ARTS	advanced remote tracking station

ARTS	automated restricted tracking system
ARTS	automated retrieval and tracking system
ARTSE	Ada run-time support environment (for embedded systems)
ARU	attitude reference unit
AS	antispoof
AS&ASD	Autonetics Sensors and Aircraft Systems Division
AS/CP	attitude set/control panel
AS/RS	automated storage and retrieval system
ASA	abort sensor assembly
ASA	adapter service area
ASA	advanced system avionics
ASA	aerosurface amplifier
ASA	aerosurface servoamplifier
ASA	American Standards Association
ASAC	aerodynamic surfaces assembly and checkout
ASAP	ACE Shuttle application processing
ASAP	advanced sensor analysis program
ASAP	Aerospace Safety Advisory Panel
ASAP	as soon as possible
ASAPTS	automated scheduling and product tracking system
ASAS	aerodynamic stability augmentation system

ASAT	antisatellite
ASATS	antisatellite simulation
ASB	airlock stowage bag
ASC	aerodynamic surface control
ASC	aerosurface control
ASC	airlock support component
ASC	American Satellite Corporation
ASC	array stowage container
ASC	Ascension Island
ASC	automatic sensitivity control
ASC	auxiliary switch normally closed
ASCADS	aft station command and data system
ASCE	airlock signal conditioning electronics
ASCE	American Society of Civil Engineers
ASCII	American Standard Code for Information Interchange
ASCOP	Applied Science Corporation of Princeton (Division of EMR)
ASCP	attitude set control panel
ASCS	atmosphere storage and control subsystem (Spacelab)
ASCS	atmospheric storage and control section
ASCS	attitude stabilization and control system
ASD	advanced systems development

ASD	Aeronautical Systems Division (Air Force)
ASDE	aerosurface driver electronics
ASDM	aerosurface driver/monitor
ASDTIC	analog-signal-to-discrete-time-interval converter
ASE	advanced space engine
ASE	aerospace support equipment
ASE	airborne support equipment
ASE	automatic support equipment
ASEA	American Society of Engineers and Architects
ASED	Avionics System Engineering Division (JSC)
ASF	Atmospheric Science Facility
ASFT	abbreviated system functional test
ASFTS	auxiliary system function test stand
ASG	Aeronautical Standards Group
ASG	Avionic Subsystems Group
ASGPD	attitude set and gimbal position display
ASI	airspeed indicator
ASI	amended shipping instructions
ASI	augmented spark igniter
ASI	augmented spark indicator
ASI	augmented system ignition

ASIC	application-specific integrated circuit
ASIC	application-specific integration circuit
ASK	amplitude shift keying
ASKA	automatic system for kinematic analysis
ASL	above sea level
ASL	approved source list
ASLU	antenna select logic unit
ASM	air-to-surface missile
ASM	American Society for Metals
ASME	American Society of Mechanical Engineers
ASN	average sample number
ASO	auxiliary switch normally open
ASO	Aviation Safety Office
ASP	aerosurface position
ASP	airborne science program
ASPI	aerosurface position indicator
ASPP	atmospheric and space plasma physics
ASPR	armed service procurement regulation
ASPS	annular suspension and pointing system
ASPSL	ASPP Sortie Laboratory
ASQC	American Society for Quality Control

ASR	air-sea rescue
ASR	automatic send and receive
ASR	avionic system review
ASRE	American Society of Refrigerating Engineers
ASRM	abort solid rocket motor
ASRM	advanced solid rocket motor
ASRS	automated Shuttle requirement system
ASRS	automated support requirements system
ASSD	Autonetics Strategic Systems Division
ASSE	American Society of Sanitary Engineers
ASSESS	airborne science Shuttle experiments system simulation
ASSH	advanced space systems hardening
ASSO	assistant system security officer
ASST	American Society for Steel Treating
AST	all-systems test
AST	Atlantic standard time
ASTB	AGN&C simulation test bed
ASTD	Advanced Space Technology Division
ASTE	American Society of Tool Engineers
ASTF	Aeropropulsion System Test Facility
ASTG	Aerospace Test Group

ASTIA	Armed Services Technical Information Agency
ASTM	American Society for Testing Materials
ASTP	Apollo-Soyuz Test Project
ASTRA	advanced star tracker
ASTRO	ascent trajectory optimization
ASTS	avionic system test specification
ASVIB	algorithm scoreboard vibrations
AT	access tower
AT	action time
AT	assembly truss
AT&L	acceptance test and logistics
AT&T	American Telephone & Telegraph
ATA	abort time assembly
ATA	advanced tactical aircraft
ATA	aft test article
ATA	Air Transport Association
ATA	assembly test article
ATA	avionics test article
ATAC	Advanced Technology Advisory Committee
ATC	ablative thrust control
ATC	active thermal control

ATC	Air Training Command
ATC	air traffic control
ATC	aircraft target computer
ATC	assistant test conductor
ATC	ATE computer
ATC/FTD	Air Training Command/Field Training Detachment
ATCA	attitude translation control assembly
ATCO	ambient temperature catalytic oxidizer
ATCS	active thermal control system (subsystem)
ATDAP	aircraft target data acquisition program
ATDB	aerothermal data book
ATDB	aerothermodynamic data book
ATDF	automated test development folder
ATDP	acceptance test data package
ATDP	aircraft target data program
ATDRP	aircraft target data reduction program
ATE	aerospace training equipment
ATE	airborne test equipment
ATE	automated test equipment
ATE	automatic test engineer
ATE	automatic test equipment

ATF	advanced tactical fighter
ATG	Aerospace Test Group
ATG	automated time line generator
ATH	above the horizon
ATI	average total inspection
ATIS	automatic terminal information system
ATL	Advanced Technology Laboratories
ATL	Aero-Thermal Lab (Marquardt)
ATL	Avionics Test Laboratory
ATLAS	abbreviated test language for avionic systems
ATLAS	analysis of thrust structure loads and stresses
ATM	Apollo telescope mount
ATM	ascent trajectory model
ATO	abort to orbit
ATO	automatic turn-on
ATOLL	acceptance test of launch language
ATOP	Ada technology operational planning
ATOS	automated technical order system
ATP	acceptance test procedure
ATP	acceptance test program
ATP	acquisition, tracking, and pointing

ATP	activation test program
ATP	advanced technical payroll
ATP	airborne tracking and pointing
ATP	authority to proceed
ATP-FC	acquisition, tracking, and pointing fire control
ATPA	alpha temperature probe assembly
ATPG	automatic test program generator
ATPSE	acquisition, tracking, and pointing system emulator
ATR	air transport rack
ATR	air transport radio
ATR	air transport rating
ATR	air transportation rack
ATRS	automated training records system
ATS	acceptance test specification
ATS	Atlantic tracking station
ATS	automatic terminal system
ATS	automatic test set
ATS	automatic transcribing system
ATS	administrative telephone system
ATS	administrative terminal system
ATS	advanced technology satellite

ATS	analog tone signal
ATS	applications technology satellite
ATS	assembly trusses and structure
ATS	asynchronous task storage
ATS	Atlantic tracking ship
ATT	acceptance thermal testing
ATTACK	advanced threat technology attack coordination and
ATTS	automatic telemetry tracking system
ATU	audio terminal unit
ATU	audio/thermal unit
ATVC	ascent thrust vector control (controller)
ATVC	automatic thrust vector control
ATVCD	ascent thrust vector control driver
ATVCS	automatic thrust vector control system
AU	accounting unit
AU	astronomical unit
AUASAM	automatic aimpoint selection and maintenance
AUB	aft utility bridge
AUC	average unit cost
AUCV	advanced unmanned cargo vehicle
AUDF	automated unit development folder

AUF	authorized user file
AUP	Ames unitary plan (wind tunnel)
AUTO-BF	automatic body flap
AUTO-P	automatic pitch control mode
AUTO-YR	automatic yaw roll mode
AUTODIN	automatic digital network
AUTOVON	automatic voice network
AV	audiovisual
AV	average value
AVC	automatic volume control
AVCG	automatic vapor crystal growth
AVCOR	algorithm vibration correlation
AVCS	attitude and velocity control system (subsystem)
AVD	air vehicle detection
AVE	aerospace vehicle equipment
AVE	airborne vehicle equipment
AVE	atmospheric variability experiment
AVE	automatic volume expansion
AVE	Avenal (TACAN station)
AVID	automated verification information data base
AVL	address validity

AVL	Avionics Verification Laboratory
AVLSI	advanced, very large scale integration
AVO	avoid verbal orders
AVRCS	attitude, velocity, reaction control system
AVREL	availability and reliability program
AVSM	auxiliary video switch matrix
AVT	acceptance vibration testing
AVVEU	altitude/vertical velocity indicator electronic unit
AVVI	altitude/vertical velocity indicator
AW	airlock wall
AW	assembly workstand
AWAA	attack warning and attack assessment
AWACS	advanced warning and control system
AWCS	agency-wide coding structure
AWG	Activation Working Group
AWG	American wire gauge
AWI	accommodation weight investigation
AWL	augmented wire list
AWL	automated wire list
AWPV	automated weld process verification
AWS	advance warning system

AWS	air weather service
AWS	American Welding Society
AWS	automated wiring system
AXAF	Advanced X-ray Astrophysics Facility
AZEL	azimuth and elevation
Ada	DOD high-level programming language
Adc	amperes direct current
Al-Li	aluminum lithium
B&P	budgetary and planning
B-L	bill of lading
B/A	barometric
B/A	boost/abort
B/A	buffer amplifier
B/C	bench check
B/L	baseline
B/M	bench maintenance
B/O	booster/orbiter
B/O	breakout
B/O	burnout
B/P	blood pressure
B/SC	brake/skid control

B/V	bleed valve
BA	bank angle
BA	breathing air
BAC	Boeing Aerospace Company
BAC	Boeing Aircraft Company
BAC	booster assembly contractor
BAC	budget at completion
BAC	buffer access card
BACS	body axis coordinate system
BAF	Barnes absorption filter
BAFO	best and final offer
BAI	barometric altitude indicator
BAIR	breathing air
BAN	budget allocation notice
BAROC	baroset correction
BARS	baseline accounting and reporting system
BAS	breathing air system
BASD	Ball Aerospace Systems Division
BASS	backup avionics system software
BATE	base activation test equipment
BATES	battlefield artillery tactical engagement system

BATSE	Burst and Transient Source Experiment
BAU	business as usual
BB	baseband
BB	brassboard
BB	breadboard
BBC	before-business clearance
BBN	Bolt, Beranek, and Newman
BBS	DEC all-in-one bulletin board system
BBXRT	broadband X-ray telescope
BC	base construction
BC	broadcast
BC	bus coupler
BC	baseline configuration
BC	battery charge
BC	battery conditioner
BC	bell cord
BC	beta cloth
BC	between centers
BC	binary counter
BC	bolt center
BCC	beacon control console

BCCT	break control command transducer
BCD	baseline concept definition
BCD	baseline configuration document
BCD	binary-coded data
BCD	budget change document
BCE	backup control electronics
BCE	burn control element
BCE	bus control element
BCH	base Chaudhuri-Hocquenghen
BCH	binary-coded hexadecimal
BCI	baseline configuration identification
BCID	baseline candidate item data base
BCLS	base cardiac life support
BCO	booster cutoff
BCP	base condemnation percent
BCP	benchmark control point
BCR	bar chart report
BCR	budget change request
BCRD	basic consolidated requirements document
BCRT	binary code range time
BCS	beam control system

BCT	bus configuration table
BCU	battery control unit
BCU	bus control unit
BCWP	budget costs for work performed
BCWS	budgeted cost for work scheduled
BD	binary decoder
BD	binary digit
BD	binary discrete
BDA	backup drive amplifier
BDA	Bermuda Island (STDN)
BDCR	baseline document change request
BDD	baseline definition document
BDD	burst detection dosimeter (IGS)
BDD	burst detector dosimeter
BDI	budget data and integration
BDP	burst detection processor (IGS)
BDP	burst detector processor
BDS-2	booster phase detection system
BDT	block data transfer
BDW	burst detector EMP sensor
BDW	EMP sensor

BDX	burst detection X-ray sensor
BDX	burst detector X-ray sensor
BDY	burst detector optical sensor
BE	beam expander
BE	bell end
BEAF	beam expander alignment function
BEC	backup event controller
BECO	booster engine cutoff
BER	bit error rate
BESS	biomedical experiment scientific satellite
BESS	biomedical experiment support satellite
BEST	booster exhaust study test
BET	best-estimate trajectory
BET	best estimate of trajectory
BETA	ballistic exploitation and target acquisition
BF	back feed
BF	beat frequency
BF	body flap
BFC	backup flight control (controller)
BFC	body flap control
BFCS	backup flight control system

BFEC	Bendix Field Engineering Corporation
BFL	back focal length
BFL	Bakersfield (TACAN station)
BFN	beam-forming feed network
BFO	beat frequency oscillator
BFP	buyer-furnished part
BFRP	boron fiber-reinforced plastic
BFS	backup flight software
BFS	backup flight system
BFSPLP	BFS payload preprocessor
BFSS	backup flight software system
BG	back gear
BH/MP	breather hose/mouthpiece
BHN	Brinell hardness number
BHP	brake horsepower
BHS	base heat shield
BI	background information
BIA	booster insertion and abort
BIA	bus interface adapter
BIB	blocked impurity band
BIBIB	back-illuminated blocked impurity band

BIC	bus interface controller
BILBO	built-in logic block observer
BIS	biocide injection system
BISC	biomedical instrumentation, scientific and crew
BIT	built-in test
BITE	built-in test equipment
BITS	budget impact tracking system
BIU	buffer interface unit
BIU	bus interface unit
BJR	blockhouse junction rack
BKNO3	boron-potassium nitrate
BLOW	booster lift-off weight
BLPG	buried long-period grating
BLS	bottom left side
BLV	bleed valve
BM	ballistic missile
BM	battle management
BM	bench maintenance
BM	body-mounted
BM	branch manager
BM	business manager

BM-TW/AA	ballistic missile tactical warning/attack
BM/C3	battle management and command, control, and
BMA	body-mounted accelerometer
BMAG	body-mounted attitude gyro
BMAP	buffer map
BMAS	body-mounted accelerometer system
BMB	base maintenance building
BMB	bench maintenance building
BMC3	battle management communications (three types)
BMD	ballistic missile defense
BMDATC	Ballistic Missile Defense Advanced Technology Center
BMDSCOM	Ballistic Missile Defense Systems Command
BME	bench maintenance equipment
BMEWS	ballistic missile early warning system
BMFT	German D-1 Spacelab payload
BMI	Battelle Memorial Institute
BMMD	body-mass measuring device
BMO	Ballistic Missile Office
BMO	ballistic missile organization
BMS	background measurement satellite
BMS	battle management simulation

BMTS	bench maintenance test set
BMU	bus monitor unit
BMVU	ballistic missile view
BN	ballistic number
BN	bullnose
BNS	bomb navigation system
BO	beating oscillator
BOA	broad ocean area
BOC	Base Operations Contract (contractor)
BOC	blowout coil
BOD	beneficial occupancy date
BOD	bright-object detector
BOE	break of entry
BOF	beginning of file
BOI	break of integrity
BOL	beginning of life
BOM	beginning of month
BOM	bill of material
BOP	baseline operations plan
BOP	basic overall polarity
BOPACE	Boeing plastic analysis capability for engines

BOS	backup operating system
BOS	bright-object sensor
BOSO	ballistic orbital support operations
BOT	beginning of tape
BOW	bill of work
BP	back pressure
BP	budgetary and planning
BP	buttock plane
BP	bandpass
BP	barber pole
BP	base plate
BP	bid and proposal
BP	blood pressure
BP	blueprint
BP	boilerplate
BP	boiling point
BPC	backpressure control
BPC	boost protective cover
BPD	baseline program document
BPD	baseline program documentation
BPI	boost phase intercept

BPMS	blood pressure measuring system
BPO	blanket purchase order
BPR	bimonthly progress report
BPR	bypass ratio
BPS	boost propulsion system
BPSK	biphase shift key
BPSK	biphase shift keying
BPT	body point
BPV	bipropellant valve
BR	bit rate
BRAVO	business risk and value of operation in space
BRCS	basic reference coordinate system
BRDF	bidirectional reflectance distribution function
BRF	band rejection filter
BRIL	budget receipt/issuance log
BRL	Ballistic Research Laboratory
BRM	baseline reference mission
BRM	biological research module
BRRS	Banana River Repeater Station
BRS	bottom right side
BS	backup subsystem

BS	beam splitter
BS	block specification
BSA	battery bus solar array
BSA	bus status/alternate bus table
BSC	brake skid controller
BSD	Ballistic Systems Division
BSDP	booster-stage discharge pressure
BSE	booster systems engineer
BSEE	Bachelor of Science degree in electrical engineering
BSGE	Bachelor of Science degree in general engineering
BSI	basic shipping instruction
BSI	Boeing Services International
BSI	booster situation indicator
BSM	beam-steering mechanism
BSM	booster separation motor
BSME	Bachelor of Science degree in mechanical engineering
BSP	business system planning
BSR	basic system release
BSR	BITE status register
BSRM	booster solid rocket motor
BSS	backup system services

BSTS	boost surveillance and tracking system
BSTS	boost surveillance tracking system
BSW	BFS software
BT	burn time (engine)
BTC	binary time code
BTC	bus tie contractor
BTE	bench test equipment
BTH	below the horizon
BTMS	body temperature measuring system
BTR	burn time remaining
BTR	bus transfer
BTU	bus terminal unit
BU&C/O	buildup and checkout
BUAER	Bureau of Aeronautics (Navy)
BUC	backup computer
BUC	Buckhorn (GSTDN)
BUFC	backup flight controller
BUIC	backup interceptor control
BUN	BITE update notice
BUORD	Bureau of Ordnance (Navy)
BUOU	backup optical unit

BUR	backup rate
BUSGEN	Bussin generator
BUSHIPS	Bureau of Ships
BV	balanced voltage
BV	boost vehicle
BV	booster vehicle
BVC	boost voltage converter
BW	bandwidth
BW	beam width
BW	bridge wire
BWG	Birmingham wire gauge
BWO	backward wave oscillator
Btu	British thermal unit
C	candle
C	core (metal)
C	cosine
C	cycle
C	hundred
C	capacitance
C	cathode
C	Celsius

C	center
C	centigrade
C	coefficient
C	complete
C	constant
C&C	command and control
C&C	communication and control
C&CS	command and control subsystem
C&D	communication and data
C&D	controls and displays
C&DH	command and data handling
C&DP	control and data processor
C&DS	command and data simulator
C&DSS	communication and data subsystem
C&I	communication and instrumentation
C&M	control and monitoring
C&P	contracts and pricing
C&T	communication and tracking
C&TS	communications and tracking system
C&TSS	communication and tracking subsystem
C&W	caution and warning

C-BARS	classified baseline accounting and reporting system
C-C	carbon-carbon
C-C	center-to-center
C-DEL	complete delivery
C-RFE	C-band RF electronics
C-to-C	computer-to-computer
C/A	coarse acquisition (navigation signal)
C/A	code standard positioning service
C/B	circuit breaker
C/C	combustion chamber
C/D	countdown
C/DPM	cost/design performance management
C/F	center frequency
C/O	changeout
C/O	checkout
C/O	contamination/overpressure
C/O	cutoff
C/P	cold plate
C/R	commutation rate
C/S	cost/schedule
C/S/P	cost/schedule/performance

C/SC	cost/schedule control
C/SCS	cost/schedule control system
C/SCSC	cost and schedule control system criteria
C/SCSC	cost/schedule control systems criteria
C/SR	cost/schedule report
C/SSR	cost/schedule status report
C/T	control and timing
C/W	carrier wave
C/W	caution and warning
C2	command and control
C2I	command, control, and intelligence
C2S	command and control subsystem
C3	command, control, and communications
C3I	command, control, communications, and intelligence
CA	carrier aircraft
CA	completion of assembly
CA	cone angle
CA	contract advice
CA	contract award
CA	corrective action
CA	cost account

CA	critical analysis
CAA	Civil Aeronautics Administration
CAA	composite audio amplifier
CAA	cost account authorization
CAALIS	computer-aided assembly-line inspection system
CAAT	computer-aided assembly tool
CAB	Civil Aeronautics Board
CAB	Civil Aviation Board
CAB	computer address bus
CAB	Corrective Action Board
CAB	Cost Audit Board
CACB	center aisle connector bracket
CACC	communications and configuration console
CAD	computer-aided design
CAD-OPS	computer-aided design costing for operations
CADAM	computer graphics augmented design and manufacturing
CADDS	computer-aided design and drafting system
CADE	controller/attitude direct electronics
CADFISS	computation and data flow integrated subsystem
CADS	command and data simulator
CADS	computer-aided design system

CADSI	communication and data systems integration
CADU	control and display unit
CAE	computer-aided engineering
CAE	corrective action engineer
CAFB	Chanute Air Force Base
CAI	computer-aided instruction
CAIT	computer-aided instruction terminal
CAIT	computer-aided instruction trainer
CAL	canister airlock
CAL	computer-aided logistics
CAL	contract advice letter
CAL	Cornell Aeronautical Laboratory
CALS	computer-aided acquisition and logistics support
CALS	computer-aided logistics system
CALST	Cornell Aeronautical Laboratory Shock Tunnel
CAM	carrier aircraft modification
CAM	Civil Aeronautics Manual
CAM	computer annunciation matrix
CAM	computer-aided manufacturing
CAM	content-addressable memory
CAM	cost account manager

CAMERA	control and monitoring equipment resource allocation
CAMP	common Ada missile package
CAMP	computer-aided message processing
CAN	certification analysis network
CAO	Cost Administration Office
CAP	capability assurance program
CAP	computer application program
CAP	contractor-acquired property
CAP	cost account package
CAP	cost account plan
CAP	crew activity plan
CAPRI	capacitance rate integrator
CAPS	common attitude pointing system
CAPS	crew activity planning system
CAPS	crew altitude protection suit
CAPS	crew altitude protection system
CAPSS	computer-aided planning and scheduling system
CAR	certification analysis requirements
CAR	certification approval request
CAR	configuration and acceptance review
CAR	contractual action request

CAR	corrective action record
CAR	corrective action report
CAR	corrective action request
CAR	customer acceptance review
CARB	Central Acquisition Review Board
CARDE	Canadian Armament Research and Development Establishment
CARID	customer acceptance report item disposition
CARID	customer acceptance review item disposition
CARM	customer accommodation requirement model
CARR	customer acceptance readiness review
CARR	customer accommodation requirement representative
CARS	configuration accounting and reporting system
CAS	calibrated airspeed
CAS	CITE augmentation system
CAS	command augmentation system
CAS	computer airspeed
CAS	configuration accounting system
CAS	cooperative application satellite
CAS	cost accounting standard
CAS	crew accommodation system
CAS-P	CAS pitch control mode

CAS-YR	CAS yaw roll control mode
CASB	Cost Accounting Standards Board
CASE	care application service element
CASE	computer-aided system engineering
CASE	computer-automated software engineering
CASES	control and structures experiments for space
CASO	cancellation addendum sales order
CASP	change assessment summary package
CASR	cost and schedule reporting system
CASS	CITE augmentation support system
CASS	consolidated automated support system
CAT	computer-aided test
CAT	control attenuator timer
CAT-2	communications and tracking comprehensive analysis tool
CATS	change action tracking system
CATS	correspondence action tracking system
CAU	command acquisition unit
CAU	command activation unit
CAU	customer acquisition unit
CAWG	Customer Accommodation Working Group
CB	center of buoyancy

CB	circuit breaker
CB	coax (or coaxial) interface bracket
CB	control board
CBA	C-band transponder antenna
CBA	collective bargaining agreement
CBARS	classified baseline accounting and reporting system
CBB	contract budget baseline
CBC	change board commitment
CBC	complete blood count
CBE	connector bracket experiment
CBIL	common and bulk items list
CBO	Congressional Budget Office
CBP	connector bracket power
CBR	California bearing ratio
CBS	connector bracket signal
CBSA	cargo bay stowage assembly
CBT	computer-based training
CBV	cabin bleed valve
CBW	constant bandwidth
CBX	C-band transponder
CBrF3	bromotrifluoromethane (fire-extinguishing material)

CC	carbon-carbon
CC	contract completion
CC	control center
CC	corner cube
CC	cost center
CC	crew certified
CC	crew compartment
CC	channel controller
CC	closing coil
CC	color code
CC	commercial control
CC	communications control
CC	compatibility change
CC	computer center
CC	contamination control
CCA	communications carrier assembly
CCA	contract change authority
CCA	contract change authorization
CCAFS	Cape Canaveral Air Force Station
CCATS	command communications and telemetry system
CCB	Change Control Board

CCB	Configuration Control Board
CCBD	Configuration Control Board directive
CCBD	Control Change Board directive
CCC	central computer complex
CCC	command control console
CCC	communication control center
CCC	complex control center
CCC	computer checkout console
CCC	Consolidated Controls Corporation
CCC	contaminant control cartridge
CCC	controller checkout console
CCC	coordinate conversion computer
CCCD	crew compartment configuration drawing
CCD	central command decoder
CCD	charge-coupled device
CCD	checkout command decoder
CCD	constants change display
CCDR	contractor critical design review
CCE	computer command engineer
CCE	continuous control evaluator
CCF	central computer facility

CCF	converter compressor facility
CCFF	Cape Canaveral Forecast Facility
CCFT	controlled current feedback transformer
CCHS	crew compartment heat shield
CCIM	command computer input multiplexer
CCIR	International Radio Consultative Committee
CCL	closed-circuit loop
CCL	commonality candidate list
CCL	critical characteristics list
CCM	controlled carrier modulation
CCM	counter-countermeasure
CCM	crew/cargo module
CCME	contract change mass estimate
CCMS	checkout, control, and monitor subsystem (LPS)
CCMS	command, control, and monitor system
CCMTA	Cape Canaveral Missile Test Annex
CCN	contract change negotiation
CCN	contract change notice
CCN	contract change notification
CCO	contract change order
CCO	current-controlled oscillator

CCO	customer contracting officer
CCOH	corrosive contaminants, oxygen, and humidity
CCP	center console panel
CCP	contamination control plan
CCP	contract change proposal
CCP	controlled components program
CCP	corrosion control plan
CCP	cost control program
CCP	Change Control Panel
CCP	change control package
CCP	commercial change proposal
CCP	computer control panel
CCP	configuration change point
CCP	Configuration Control Panel
CCP	configuration control phase
CCP	configuration control point
CCPDSR	common center processing and display system replacement
CCPDSR	communications center processing and display system
CCR	cargo compatibility review
CCR	configuration control record
CCR	contract change record

CCR	contract change request
CCR	contractor change review
CCR	control center rack
CCRA	Cape Canaveral reference atmosphere
CCRF	consolidated communication recording facility
CCS	central computer and sequencer
CCS	central control section
CCS	central control station
CCS	command and communication system
CCS	complex control set
CCS	computer core segment
CCS	console communication system
CCS	contamination control system
CCS	contract control system
CCSD	Chrysler Corporation Space Division
CCSD	Collins Communications Systems Division
CCSDS	Consultative Committee for Space Data Systems
CCSR	carbon-carbon survivable radiator
CCSR	crew compartment stowage review
CCT	command/control transmitter
CCT	computer-compatible tape

CCTCF	communication circuit technical control facility
CCTV	closed-circuit television
CCU	camera control unit
CCU	central control unit
CCU	communications carrier umbilical
CCU	communications carrier unit
CCU	coupling control unit
CCU	crew communications unit
CCU	crew compartment umbilical
CCU	crewman communications umbilical
CCV	chamber coolant valve
CCVA	chamber coolant valve actuator
CCW	counterclockwise
CCZ	command and control zone
CD	call director
CD	candela (luminous intensity)
CD	coefficient of drag
CD	coin dimple
CD	cold-drawn
CD	command decoder MDM
CD	components demonstration

CD	countdown
CD	current density
CD&SC	Communications, Distribution, and Switching Center
CD/V	concept definition and validation
CDA	command and data acquisition
CDA	critical design audit
CDAS	configuration design analysis simulation
CDAS	configuration development analysis and simulation
CDAS	configurations development analysis simulation
CDAS	core design analysis simulation
CDB	central data buffer
CDB	command data base
CDB	computer data bus
CDBFR	common data buffer
CDC	classified document control
CDC	Collins Defense Communications
CDC	command and data handling console
CDC	Computer Development Center (NASA)
CDC	confined detonating cord
CDC	Control Data Corporation
CDC	countdown clock

CDCD	cargo design control drawing
CDCD	Collins Defense Communications Division
CDCM	coupling display, manual control IMU
CDCO	coupling display, manual control optics
CDD	command decoding and distribution
CDD	common data dictionary
CDDB	common diagnostic data base
CDDT	countdown demonstration test
CDF	cable distribution frame
CDF	central data facility
CDF	circuit design fabrication
CDF	combined data file
CDF	confined detonating fuse
CDF	cool-down facility
CDF&TDS	circuit design, fabrication, and test data
CDG	Concept Development Group
CDH	constant delta height
CDH	constant differential height
CDI	contract definition instruction
CDI	course deviation indicator
CDID	contract data item description

CDM	communications data manager
CDM	configuration design module
CDMA	code division multiple access
CDMS	command and data management system (subsystem)
CDMS	contractor data management system (VAFB)
CDN	CDR discrepancy notice
CDNR	CDR discrepancy notice record
CDOM	chief draftsman office memorandum
CDP	command data processor
CDP	computational data processing
CDP	computer data processing
CDP	confidence development program
CDP	critical design parameter
CDPA	classified data preparation area
CDPIS	command data processing and instrumentation system
CDQ	certificate of qualification
CDQR	critical design and qualification review
CDR	cleaning, decontamination request
CDR	command destruct receiver
CDR	conceptual design review
CDR	configuration design review

CDR	contract data requirements
CDR	critical design review
CDRL	contract data requirements list
CDRR	contract documentation requirements record
CDRS	contract data requirements schedule
CDS	cavity digitizing system
CDS	control and display system
CDS	control data system
CDS	controller select direction
CDS	coupling display system
CDS	central data subsystem (LPS)
CDS	central data system
CDS	closeout door system
CDS	cold-drawn steel
CDS	computer design and simulation
CDS	configuration design system
CDS	configuration development system
CDS	consolidated direct support
CDSC	Communication Distribution and Switching Center
CDSC	coupling-display scanning-telescope manual control
CDSF	commercially developed space facility

CDSL	Computer Data System Laboratory
CDSR	contract data status report
CDSR	cost data summary report
CDT	central daylight time
CDT	command descriptor table
CDT	compressed data tape
CDT	configuration data table
CDT	countdown time
CDU	computer display unit
CDU	coupling data unit
CDU	coupling display unit
CDU	CRT display unit
CDUM	coupling display unit IMU
CDUO	coupling display unit optics
CDW	command data word
CDW	computer data word
CDW	control data word
CE	cargo element
CE	change engineer
CE	change evaluation
CE	civil engineering

CE	control element
CE	Corps of Engineers
CE	cost element
CE	crew equipment
CE	current expendable
CE/CK	computer entry/control keyboard
CEA	circular error average
CEA	Computer Engineering Associates
CEA	control electronics assembly
CEC	Civil Engineering Corps
CEC	Consolidated Electrodynamics Corporation
CEC	Consolidated Electronics Corporation
CEC	control electronics container
CEC	control encoder coupler
CECP	compatibility engineering change proposal
CEDC	cyclic error detection code
CEEP	composite entry evaluation program
CEF	comsec equipment facility
CEI	configuration end item
CEI	contract end item
CEIAC	Coastal Engineering Information Analysis Center

CEIS	combined elements and integrated systems
CEIS	contract end item specification
CEIT	cargo equipment integrated test
CEIT	crew equipment integration test
CEIT	crew equipment interface test
CELSS	controlled ecological life support system
CELV	commercial expendable launch vehicle
CEM	cost estimating method
CEMF	counterelectromotive force
CEO	chief engineer's office
CEO	chief executive officer
CEP	circle of equal probability
CEP	circular error probability
CEP	circular error probable
CEP	comsec equipment program
CEP	configuration evaluation plan
CEPS	CITS expert parameter system
CEQ	Council on Environmental Quality
CER	cost estimating relationship
CES	combined Earth sensor
CES	concept evaluation study

CES	conical Earth sensor
CES	control electronics section
CES	crew escape system
CESA	Canadian Engineering Standards Association
CET	clutter equivalent target
CET	combined element test
CETA	crew and equipment translation aid
CETF	Critical Evaluation Task Force
CEU	control electronics unit
CF	carrier frequency
CF	center forward
CF	center of flotation
CF	centrifugal force
CF	completion form
CF	consequence of failure
CF	corner fitting
CFAE	contractor-furnished airborne equipment
CFAR	constant false alarm rate
CFC	central fire control
CFC	chlorofluorocarbon
CFD	computational fluid dynamics

CFD	converter frequency to dc voltage
CFD	cumulative frequency distribution
CFE	central framework executive
CFE	consolidated front end
CFE	contractor-furnished equipment
CFE	critical function equipment
CFE	customer-furnished equipment
CFES	continuous flow electrophoresis system
CFI	card format identifier
CFM	customer-furnished material
CFP	conceptual flight profile
CFR	Code of Federal Regulations
CFRP	carbon-fiber-reinforced plastic
CFSD	critical-function sequence diagram
CFSR	contract fund status report
CFSR	contract funds status review
CFSTI	Clearinghouse for Scientific and Technical Information
CFT	cross-functional team
CFY	company fiscal year
CGAD	Collins General Aviation Division
CGAU	cabin gas analysis unit

CGC	command guidance computer
CGF	command generation function
CGL	comprehensive general liability
CGP	central grounding point
CGSS	cryogenic gas storage system
CH	case hardening
CH	control house
CH/SL	certified hardware/software list
CH4	methane
CHARM	composite high-altitude radiation model
CHI	computer-to-human interface
CHIP	College Hire Indoctrination Program
CHL	certified hardware list
CHR	Cooper-Harper rating
CHROMEX	chromosome and plant cell division in space
CHSF	cargo hydrazine service facility
CHW	command header word
CHX	cabin heat exchanger
CHX	condensing heat exchanger
CI	cast iron
CI	crew interface

CI	center of impact
CI	certification inspection
CI	color interior film
CI	configuration inspection
CI	configuration item
CI	continuous interlock
CI	contract initiation
CI	course invalid
CIA	Central Intelligence Agency
CIA	configuration identification accounting
CIA	control interface assembly
CIA	controller interface assembly
CIAP	climatic impact assessment program
CIB	Change Impact Board
CIB	Change Implementation Board
CIB	control interface block
CIC	cargo integration contractor
CIC	command interface control
CIC	control and information center
CIC	critical item consolidation
CICC	cargo integration control center

CICCR	configuration information control center requirement
CICU	communication interface control unit
CICU	computer interface conditioning unit
CID	cable interconnect diagram
CID	charge injection device
CID	computer interface device
CIDL	configuration item data list
CIDR	critical intermediate design review
CIDSC	contractor in-house data support capability
CIE	cargo integration equipment
CIE	communications interface equipment
CIF	Central Information Facility (AMR)
CIF	central instrumentation facility
CIG	Cable Integrity Group
CIG	Communications and Interface Group
CIG	compound interlace grating
CIG	Connector Integration Group
CIG	Connector Integrity Group
CII	change installation instruction
CII	configuration item identifier
CIJB	cradle interface junction box

CIL	critical items list
CIM	computer input multiplexer
CIM	computer-integrated manufacturing
CIMS	consolidated information management system
CIN	center information network
CIN	change identification number
CIN	change identifier number
CINC	commander-in-chief
CINCAD	commander-in-chief, Air Defense
CINCNET	commander-in-chief network
CINCNORAD	commander-in-chief, North American Aerospace
CINCSAC	commander-in-chief, Strategic Air Command
CINCSBL	commander-in-chief, Space-Based Laser
CIP	cast-iron pipe
CIP	change implementation plan
CIP	Class 1 Integration Plan
CIP	communications interface processor
CIP	control and interface panel
CIR	cargo integration review
CIR	configuration inspection report
CIR	critical item report

CIRD	cargo integration review dry run
CIRHS	critical items and residual hazards list
CIRM	celestial infrared mapping
CIRM	celestial infrared measurements
CIRRIS	cryogenic infrared radiance instrumentation for Shuttle
CIS	cargo integration schedule
CIS	central integration site
CIS	change impact summary
CIS	communication interface system
CIS	contractor's information submittal
CISS	Centaur integrated support structure
CIT	California Institute of Technology
CIT	CAP initialization tape
CIT	critical item tag
CITE	cargo integration test equipment
CITS	central integrated test system
CIU	communication interface unit
CIU	computer interface unit
CIU	controller interface unit
CIVT	cargo interface verification test
CIVU	cargo integration verification unit

CIWG	Cargo Integration Working Group
CKRA	Cape Kennedy reference atmosphere
CL	centerline
CL	closed loop
CL	coefficient of lift
CL	confidence level
CLAES	cryogenic limb array etalon spectrometer
CLAS	computerized loads analysis system
CLC	change letter control
CLC	Computer Liaison Committee
CLF	Clear Lake facility
CLF	controller, load forward
CLIN	contract line item number
CLIP	combined laser instrumentation package
CLIPS	C-language inferencing for production systems
CLM	care logic module
CLM	circumlunar mission
CLMC	central logistics management center
CLOT	combined loads orbiter test
CLOUDSAT	cloud cover statistical analysis program
CLRB	Cost Limit Review Board

CLS	contingency landing site
CLSO	contingency landing support officer
CM	cargo manager
CM	control monitor
CM	countermeasure
CM	crew module
CM	center of mass
CM	change management
CM	circular mil
CM	command module
CM	configuration management
CM	configuration monitor
CM	consumable management
CM	control mode
CM&S	communications maintenance and storage
CMA	configuration management accounting
CMACS	central monitor and control system
CMAG	cruise missile advanced guidance
CMAO	contract management assistance officer
CMAR	configuration management action request
CMAT	compatible material

CMB	Configuration Management Board
CMC	central maintenance computer
CMC	command module computer
CMC	crew module computer
CMCS	centralized maintenance computer system
CMD	controller, main display
CMDB	configuration management data base
CMDM	control multiplexer/demultiplexer
CMDS	configuration management data system
CME	commercial measuring equipment
CMF	controller, motor, forward
CMG	control moment gyro
CMIF	common module integration facility
CMIS	common module integration simulator
CMIS	computer management information system
CMIS	configuration management information system
CMIS	control monitor isolation subsystem
CML	commands and measurement list
CMM	CM Manual
CMM	condition-monitored maintenance
CMM	controller, motor, midbody

CMM	coordinate measurement machine
CMN	contract master network
CMO	class mix option
CMO	Configuration Management Office
CMOS	complementary metal oxide semiconductor
CMOS/SOS	complementary metal oxide semiconductor/silicon
CMP	Configuration Management Panel
CMP	configuration management plan
CMPP	configuration management program plan
CMR	center materials representative
CMR	common mode rejection
CMR	configuration management representative
CMR	contractor management review
CMRB	Contractor Material Review Board
CMRP	configuration management requirements plan
CMRR	common mode rejection ratio
CMRS	configuration management requirements standard
CMS	change management system
CMS	code management system
CMS	component mode synthesis
CMS	configuration management system

CMS	contract master schedule
CMS	conventional monitoring system
CMS-2	Cambridge Monitoring System (IBM computer program)
CMSI	command monitor system interface
CMT	critical military target
CMTS	computerized maintenance test system
CMU	control and monitor unit
CMV	common mode voltage
CMVAS	configuration management verification accounting system
CMW	compartmented mode work station
CN	change notice
CNC	computer numerical control
CNC	computer numerically controlled
CND	cannot duplicate
CNES	Centre National D'Etudes Spatiales (French National Space Studies Center)
CNRL	Communications and Navigation Research Laboratory
CNWDI	critical nuclear weapons design information
CO	carbon monoxide
CO	Cargo Operations (KSC directorate)
CO	change order
CO	contracting officer

CO*A	cesium-dideuterium-arsenate
CO2	carbon dioxide
COA	center operations area
COAS	crewman optical alignment sight
COB	communications office building
COBE	Cosmic Background Explorer
COBOL	common business-oriented language
COC	certificate of completion
COC	close-open-close
COCOMO	constructive cost model
COD	Center Operations Directorate (JSC)
COD	crack opening displacement
COF	construction of facilities
COF	cost of facilities
COFAC	construction facility
COFI	checkout and fault isolation
COFR	certificate of flight readiness
COFR	certification of flight readiness
COFW	certificate of flight worthiness
COGMAN	center of gravity of payload manifest
COI	conflict of interest

COIL	chemical oxygen-iodine laser
COIM	checkout interpreter (software) module
COL	checkout language
COLA	cost-of-living adjustment
COM	computer output microfiche
COM	computer output microfilm
COM-M	common mode
COMAS	combined orbital maneuvering and abort system
COMAT	compatibility of materials
COMP	computation of rendezvous targeting
COMPOOL	common data pool
COMPSIM	concept mission performance simulation
COMSAT	communications satellite
CONAD	CONUS defense
CONUS	continental United States
COP	central operations program
COP	co-orbiting platform
COP	coefficients of performance
COP	combined operations plan
COP	contingency operations plan
COQ	certificate of qualification

COR	contracting officer representative
COR	contractor.s operations review
CORA	coherent optical radar amplifier
CORE	common operational research equipment
COS	carry-on oxygen system
COS	checkout station
COS	console operating system
COSATI	Committee on Scientific and Technical Information
COSI	closeout system installation
COSM	checkout servicing and maintenance
COSMIC	Computer Software Management and Information Center
COSPAC	cost/schedule planning and control
COSTA	cost accounting (code)
COT	critical optical technology
COTR	contracting officer's technical representative
COTS	commercial off the shelf
COV	cutoff value
CP	candlepower
CP	computer program
CP	console processor
CP	control panel

CP	control point
CP	coordinated procurement
CP	Cargo Projects Office (KSC)
CP	center of pressure
CP	checkpoint
CP	chemically pure
CP	circular pitch
CP	cold plate
CP	cold-punched
CP	communication processor
CP-PCO	Cargo Projects Program Control Office
CPA	change proposal analyst
CPA	contingency planning aid
CPA	critical path analysis
CPAF	cost plus award fee
CPAR	controlled parts approval
CPC	Cargo Processing Contract (contractor)
CPC	central planning center
CPC	characteristic properties code
CPC	computer program component
CPC	control pressure conditioner

CPCB	Crew Procedures Control Board
CPCEI	computer program contract end item
CPCI	computer program change instruction
CPCI	computer program configuration item
CPCR	computer program change request
CPCR	crew procedure change request (Form 482)
CPD	Crew Procedures Division
CPD	crew passive dosimeter
CPDDS	computer program detail design specification
CPDP	computer program development plan
CPDP	computer program development program
CPDR	contractor's preliminary design review
CPDS	computer program design specification
CPDS	computer program detailed specification
CPDS	computer program development specification
CPDS	crew procedures documentation system
CPE	chief program engineer
CPE	chief project engineer
CPEI	computer program end item
CPES	crew procedures evaluator simulator
CPF	cargo processing facility

CPF	central processing facility
CPF	controller, power, forward
CPF	cost per flight
CPFF	cost plus fixed fee
CPFF/IF	cost plus fixed fee/incentive fee
CPG	Change Planning Group
CPG	coarse-pointing gimbal
CPI	consumer price index
CPI	crosspointer indicator
CPIC	Computer Program Integration Contract (contractor)
CPIF	cost plus incentive fee
CPIF/AF	cost plus incentive fee/award fee
CPM	cargo propulsion module
CPM	cell performance monitor
CPM	change proposal manager
CPM	computer program module
CPM	cost and performance measurement
CPM	critical path method
CPMP	crew procedures management plan
CPMP	crew products management plan
CPO	Central Planning Office (MSFC)

CPPS	computer program product specification
CPR	cost performance report
CPR	critical problem report
CPS	coarse pointing system
CPS	critical path schedule
CPSD	cross-power spectral density
CPSE	common payload support equipment
CPSR	contractor's procurement system review
CPSS	cold plate support structure
CPSS	critical phase system software
CPT	cargo processing technician
CPT	computer program tape
CPTA	core propulsion test article
CPU	central processing unit
CPU	command processor unit
CPU	computer printer unit
CPU	computer processing unit
CPV	common pressure vessel
CQDR	critical qualification design review
CQIM	configuration and quality information management
CR	card reader

CR	contractor's response
CR	control room
CR	customer's request
CR	cathode ray
CR	certification request
CR	certification requirement
CR	change record
CR	change request
CR	cold-rolled
CR	communication and radar
CR	configuration review
CRALT	CNES radar altimeter
CRAS	cost reduction alternative study
CRB	Change Review Board
CRB	Concept Review Board
CRB	Configuration Review Board
CRB	Correspondence Review Board
CRC	contractor-recommended code
CRC	cost reduction curve
CRC	cyclic redundancy check
CRD	change request disposition

CRD	cost reporting document
CRDP	certification review data package
CRDP	computer resource development plan
CRERS	crew rescue and equipment retrieval system
CRES	corrosion resistance steel
CRG	Change Review Group
CRG	Correspondence Review Group
CRI	certification requirements index
CRIS	calibration recall and information system
CRIS	connector removal and installation sheet
CRISD	computer resource integration support document
CRISD	computer resources integrated support document
CRISP	computer resources integrated support plan
CRN	cable routing notation
CRN	change review notice
CRN	contract revision number
CRO	cathode-ray oscilloscope
CRP	configuration requirements processing
CRPL	Cosmic Ray Physics Laboratory
CRR	cargo compatibility review
CRR	cargo readiness review

CRR	computer run report
CRR	critical requirements review
CRRES	combined release and radiation effects satellite
CRS	cold-rolled steel
CRS	computer resources support
CRS	Congressional Research Service
CRS	crew rescue system
CRSI	ceramic reusable surface insulation
CRT	cathode-ray tube
CRT	computer response time
CRTU	cryogenic radiator test unit
CRW	control read/write
CS	carbon steel
CS	control segment
CS	core segment
CS	crew simulator
CS	crew station
CS	cross-strapping
CS	current sensor
CS	Spacelab Operations Directorate
CS	cast steel

CS	center section
CS	change status
CS	checkout station
CS	common set
CS	communications system (subsystem)
CS	consumables status
CS	contractor share of variance from target cost
CSA	contract specification amendment
CSA	contractor support area
CSA	cyclic strain attenuator
CSAM	crinkled, single aluminized Mylar
CSAP	Control System Analysis Program
CSAT	combined systems acceptance test
CSB	Change Schedule Board
CSB	closely spaced basing
CSB	complex support building
CSC	Computer Sciences Corporation
CSC	computer software component
CSC	computer software configuration
CSC	conical-shaped charge
CSC	contingency support center (CCAFS)

CSC	cosecant computing amplifier
CSC	cost, schedule, and control
CSCB	contractor's summary cost breakdown
CSCD	control system command decoder
CSCI	computer software configuration item
CSCI	configuration software computer item
CSCS	central security control system
CSCSAT	commercial synchronous communication satellite
CSD	Chemical Systems Division
CSD	computer system director
CSD	contract start date
CSD	control system development
CSD	Crew Systems Division
CSDD	Control Systems Development Division (JSC)
CSDF	central source data file
CSDL	Charles Stark Draper Laboratory (MIT)
CSDM	Computer System Diagnostic Manual
CSDT	computer software data tape
CSE	common support equipment
CSE	communications systems engineer
CSE	computer support equipment

CSE	configuration switching equipment
CSE	cryostat servicing equipment
CSF	central supply facility
CSF	cost sensitivity factor
CSF	crew storage facility
CSFT	combined subsystem functional test
CSG	Concept Synthesis Group
CSI	coelliptic sequence initiation
CSI	control and structural integrity
CSI	control servo input
CSI	crew software interface
CSI	customer source inspection
CSIR	computer software integration review
CSIR	computer systems (hardware/software) integration review
CSIR	Council of Scientific and Industrial Research
CSIT	CAP system integration test
CSIU	core segment interface unit
CSL	command signal limiter
CSL	computer status light
CSL	critical sequence list
CSM	Cargo System Manual

CSM	command and service module
CSM	command service module
CSM	common support module
CSM	computer status matrix
CSMA/CD/TS	carrier sense multiple access/collision dlot
CSMP	continuous system modeling program
CSMP	control system modeling program
CSN	customer source number
CSO	closely spaced object
CSO	Complex Safety Office
CSOC	Consolidated Space Operations Center
CSOC	Consolidated Support Operations Center
CSOM	Computer System Operator's Manual
CSOP	crew systems operating procedure
CSP	certified special processor
CSPF	critical single-point failure
CSPL	certified special processor list
CSPO	Control Systems Procurement Office
CSPU	core segment processing unit
CSR	certification status report
CSR	check signal return

CSR	check status register
CSR	check status report
CSR	contract status report
CSR	cost, schedule, and risk
CSR	crew station review
CSRP	Computer and Software Review Panel
CSS	computer subsystem
CSS	control stick steering
CSS	core segment simulator
CSS	crew safety system
CSSE	control system simulation equipment
CSSR	cost, schedule status report
CST	capsule systems test
CST	central standard time
CST	combined systems test
CST	complex safety technician
CST	contract supplemental tooling
CST	crew software trainer
CST	crew station trainer
CST	crew systems trainer (one-g trainer)
CSTA	crew software training aid

CSTAR	continuous stellar-tracking attitude reference
CSTC	Consolidated Space Test Center
CSTS	cryogenic storage and transfer system
CSTU	combined systems test unit
CSU	central switching unit
CT	center tap
CT	central time
CT	compact tension
CT	crawler-transporter
CT	current transformer
CTA	command and telemetry assembly
CTA	controlled thrust assembly
CTC	camera, timing, and control
CTC	chief test conductor
CTCI	contract technical compliance inspection
CTCP	configuration test change period
CTCS	central thermal control system
CTDU	cross-link transponder data unit
CTE	central timing equipment
CTE	coefficient of thermal expansion
CTF	commit to flight

CTG	Central Training Group
CTG	commonality task group
CTI	critical transportation item
CTIS	crawler-transporter intercom system
CTL	Canoga Test Laboratory
CTL	combat training launch
CTL	Component Test Laboratory (NASA)
CTL	controller tape location
CTL	critical to launch
CTM	contract technical manager
CTM	crystalline transitional material
CTN	Canton Island
CTN	certification test network
CTP	communications timing procedure
CTP	cyclic time processor
CTPD	Crew Training and Procedures Division (JSC)
CTR	certification test requirement
CTR	certification test review
CTR	contract technical representative
CTRS	component test requirements specification
CTS	Canadian technology satellite

CTS	coordinate transformation system
CTS	change tracking system
CTS	command and telemetry subsystem
CTS	communications and tracking system
CTS	communications technology satellite
CTS	computer test set
CTS	computerized training system
CTS	console test set
CTS	contractor technical service
CTT	command transfer tape
CTU	central timing unit
CTU	command and telemetry unit
CTU	command telemetry unit
CTV	compatibility test van
CU	control unit
CU	crystal unit
CUB	Commonality Usage Board
CUC	computer usage control
CUDS	cumulative data statistics
CUE	command uplink electronics
CUE	command use equipment

CUE	common usage equipment
CUE	communication unit executor
CUF	cross-utilization file
CUI	common usage item
CUI	common user interface
CUIL	common usage item list
CUL	common use list
CUP	commonality usage proposal
CUT	coordinated universal time
CV	carrier vehicle
CV	cryptovariable
CV	Deployable Payloads Operation (KSC CO directorate)
CV	check valve
CV	coefficient of variation
CV	computer vision
CV	Computervision
CV	Computervision (computer-aided design and drafting
CV	configuration verification
CV	conventional vehicle
CV	core vehicle
CVA	Convair Astronautics

CVAD	converter voltage, ac to dc
CVAS	configuration verification accounting system
CVD	chemical vapor deposition
CVDA	converter voltage discrete, ac
CVE	complete vehicle erector
CVF	circular variable filter
CVI	carbon vapor impregnation
CVI	chemical vapor infiltration
CVI	configuration verification inspection
CVR	change verification record
CVR	configuration verification review
CVRD	converter variable resistance to dc voltage
CVSD	continuous variable slope data
CVT	communications vector table
CVT	concept verification testing
CW	caution and warning
CW	clockwise
CW	command word
CW	continuous wave
CW	continuous waveform
CWA	caution and warning annunciator

CWA	clean work area
CWA	controlled work area
CWBS	contract work breakdown structure
CWE	caution and warning electronics
CWEA	caution and warning electronic assembly
CWEU	caution and warning electronics unit
CWFSP	caution and warning/fire suppression panel
CWG	Commonality Working Group
CWG	Communications Working Group
CWG	constant-wear garment
CWLM	caution and warning limit module
CWS	caution and warning system
CWSU	condensate water servicing unit
CWT	code walk-through
CY	calendar year
CYC	cyclic mission-unique process
CYI	Canary Islands
CZCS	coastal zone color scanner
Cal/OSHA	California Occupational Safety and Health Act
CdT	cadmium telluride
Cf	consequence of failure

CfS	schedule factor
D	density
D	digital
D	discrete
D	drag
D&C	displays and controls
D&CS	displays and controls subsystem
D&D	design and development
D&P	development and production
D&P	drain and purge
D&PA	design and product assurance
D*	normalized detectivity
D/A	decoder activate
D/A	digital to analog
D/C	displays and controls
D/D	digital-digital converter
D/L	data link
D/L	deorbit and landing
D/L	downlink
D/L	downlist
D/P	data pack

D/S	deploy/stow
D/S	descent stage
D/VD	data/voice data
DA	data acquisition
DA	drive assembly (solar array)
DA	Department of the Army
DA	deployed assembly
DA	deployment assembly
DA	dip angle
DA	direct ascent
DA	distribution assembly
DA	double amplitude
DA	drive actuator
DA&D	data acquisition and distribution
DA&E	data analysis and evaluation
DAA	designated approval authority
DAAT	distributed architecture analysis tool
DAB	Defense Acquisition Board
DAB	docking and berthing
DABM	defense against ballistic missiles
DABS	discrete address beacon system

DAC	data acquisition and control
DAC	data acquisition camera
DAC	days after contract
DAC	digital-to-analog converter
DACB	data acquisition control and buffer
DACBU	data acquisition and control buffer unit
DACBU	digital acquisition and control buffer unit
DACP	data acquisition and control processor
DACP	data acquisition control processor
DACP	data acquisition, control, and processing
DACS	data acquisition and control system
DACS	digital acquisition and control system
DACT	disposable absorption collection trunk
DAD	data acquisition and distribution
DAD	due at department
DADE	data acquisition and documentation equipment
DADS	dual air density satellite
DAE	data acquisition equipment
DAF	data analysis facility
DAFT	data acquisition frequency table
DAI	deferred acceptance item

DAIS	data avionics information system
DAL	data accession list
DAL	data acquisition list
DAL	data-aided loop
DAM	double-aluminized Mylar
DAMMPS	damping and metal matrix for precision structure
DANASAT	direct-ascent nuclear ASAT
DAP	data acquisition plan
DAP	descent analysis program
DAP	digital autopilot
DAPS	decommutation and processing system
DAR	data-aided receiver
DAR	defense acquisition regulation
DAR	deviation approval request
DAR	digital autopilot requirement
DAR	drawing analysis record
DARCOM	U.S. Army Material Development and Readiness Command
DARPA	Defense Advanced Research Projects Agency
DARPA/LL	DARPA Lincoln Laboratory
DART	director and response tester
DARTS	digital automated radar tracking system

DAS	data acquisition system
DAS	data analysis station
DAS	data automation system
DAS	design, analysis, and simulation
DAS	digital address system
DAS	digital avionics system
DASA	dual aerospace servoamplifier
DASD	direct-access storage device
DAT	direct-ascent threat
DAU	data acquisition unit
DAU	digital adapter unit
DAV	data available
DAVL	data available low
DAZE	different-alpha zero-strain E
DB	data base
DB	data buffer
DB	data bus
DB	dead band
DB	design baseline
DB	Disposition Board
DB	distribution box

DB	double-biased
DB	dry bulb
DBA	data base administrator
DBC	data buffer coupler
DBC	data bus control
DBC	data bus coupler
DBC	diameter bolt circle
DBCI	DB with respect to a circular polarized antenna
DBCR	data base change request
DBD	dead band
DBDD	data base design document
DBE	data bus element
DBFN	data bus file number
DBG	data bus group
DBGMP	data bus generation and maintenance package
DBI	data base interface
DBIA	data bus interface adapter
DBIA	data bus isolation amplifier
DBIU	data bus interface unit
DBM	data base management
DBMS	data base management software

DBMS	data base management system
DBN	data bus network
DBP	design baseline program
DBRN	data bank release notice
DBS	data base system
DBS	data bus simulator
DBUR	data bank update request
DBW	data bus wire
DBW	differential ballistic wind
DC	data control
DC	data coordinator
DC	design change
DC	display and control
DC	display coupler
DC	double contact
DC&I	documentation, control, and integration
DCA	Defense Communication Agency
DCA	design change authorization
DCA	digital command assembly
DCA	distribution control assembly
DCAA	Defense Contract Audit Agency

DCAR	Design Corrective Action Report
DCARS	data collection and reduction system
DCAS	data collection and analysis system
DCAS	Defense Contract Administration Services
DCASMA	Defense Contract Administration Services Management Area
DCASR	Defense Contract Administration Services Region
DCASR-LA	Defense Contract Administration Services Region, Los Angeles
DCB	Data Control Board
DCB	Design Control Board
DCB	drawing configuration baseline
DCC	data computation complex (JSC)
DCC	document control center
DCCU	decommutator conditioning unit
DCCU	digital cluster control unit
DCCU	digital communication and control unit
DCD	design control document
DCD	dual command decoder
DCDS	distributed computing design system
DCE	data and control electronics
DCE	deployable cargo element
DCEA	digital control electronics assembly

DCEP	data collection and evaluation plan
DCF	data control facility
DCIB	data communication input buffer
DCIU	digital control and interface unit
DCL	document change list
DCM	data and configuration management
DCM	data and control management
DCM	DECOM control memory
DCM	decommutator control memory
DCM	direction cosine matrix
DCM	display and control module
DCMB	Development Configuration Management Board
DCN	data change notice
DCN	design change notice
DCN	discontinued component notice
DCN	document change notice
DCN	drawing change notice
DCNP	document change notice proposal
DCO	detailed checkout
DCOP	detailed checkout procedure
DCOP	displays, controls, and operation procedure

DCOS	data communication output selector
DCP	data collection platform
DCP	data collection program
DCP	depot condemnation percent
DCP	development concept paper
DCP	development cost plan
DCP	display control program
DCPEI	DEU control program end item
DCPEI	display control program end item
DCR	data change request
DCR	document change review
DCR	DC responsivity
DCR	design certification review
DCR	design change record
DCR	design change request
DCR	design concern report
DCR	disposition of contract request
DCR	document change record
DCR	document change request
DCRR	design change requirement record
DCS	data collection system

DCS	digital command system (subsystem)
DCS	display and control system
DCS	document control system
DCS	dual checkout station
DCS	data communication system
DCS	data conditioning system
DCS	data control system
DCS	data conversion system
DCS	design communication system
DCS	design control specification
DCS	design criteria specification
DCS	detailed checkout specification
DCSP	digital control signal processor
DCSU	digital computer switching unit
DCU	digital computer unit
DCU	display and control unit
DD	data dictionary
DD	NSTS OPS deputy director of NSTS Operations
DD	data display
DD	decoder driver
DD	dedicated display

DD	deep-drawn
DD	deputy director
DD	directives documentation
DD	document director
DD	Mechanical and Facilities Engineering (DE Directorate)
DD&CS	dedicated display and control subsystem
DD&R	data display and review
DD&RR	Data Display and Review Room
DD&T	design, development, and test
DD/HH:MM:SS	day/hour:minute:second
DDA	data distribution assembly
DDA	digital differential analyzer
DDAS	digital data acquisition system
DDC	data distribution center
DDC	Defense Documentation Center
DDC	dual diversity comparator
DDD	data definition document
DDD	display decoder drive
DDDL	digital data downlink
DDDS	digital data distribution system
DDDU	display decoder driver unit

DDES	data display expert system
DDHA	digital data-handling assembly
DDI	discrete data input
DDI	discrete digital input
DDL	data base definition language
DDL	data downlink
DDL	display description language
DDL	distributed design language
DDM	data display module
DDM	data display monitoring
DDM	discrete data management
DDM	distributed data manager
DDM	distributed design methodology
DDMS	DOD manager for Space Shuttle support
DDN	defense data network
DDO	discrete data output
DDO	discrete digital output
DDP	data distribution panel
DDP	data distribution plan
DDP	design data package
DDP	design development plan

DDP	digital data processing
DDPC	digital data processing center
DDPC	digital data processing complex
DDPF	dedicated display processing function
DDPS	digital data processing system
DDR	Data Display Room
DDR	data display and review
DDR	design development record
DDR	detail design review
DDS	data display system
DDS	descent design system
DDS	detailed design specification
DDS	documentation distribution system
DDT&E	design, development, test, and engineering
DDT&E	design, development, test, and evaluation
DDTF	dynamic docking test facility
DDTS	dynamic docking test system
DDU	data display unit
DDU	decommutator distribution unit
DDU	digital display unit
DDU	display driver unit

DE	Design Engineering (KSC directorate)
DE	display electronics
DE	Doppler extractor
DE	double end
DEA	deployed electronics assembly
DEA	digital electronics assembly
DEA	display electronics assembly
DEC	Digital Equipment Corporation
DECA	display/AGAP electronic control assembly
DECL	deliverable equipment checklist
DECL	Direct Energy Conversion Laboratory (JSC)
DECNET	Digital Equipment Corporation network
DECU	data exchange control unit
DEDA	data entry and display assembly
DEE	digital events evaluator
DEF	development and evaluation facility
DEI	Data Engineering, Incorporated
DEI	deliverable end item
DEI	design engineering identification
DEI	design engineering inspection
DEI	design, engineering, and integration

DEIS	design engineering inspection simulation
DEIS	design evaluation and inspection simulator
DEL	deorbit, entry, and landing
DELNI	digital Ethernet local network interconnect
DELOG	design engineering logistics
DELTA	detailed labor and time analysis
DEMP	direct EMP
DEMUX	demultiplexer
DEOSS	demonstration of electro-optical surveillance sensor
DEP	dedicated experienced processor
DEP	deflection error probable
DEP	display electronics package
DER	drawing error report
DES	data exchange system
DESHE	distributed expert system hosting environment
DESPOT	design performance optimization
DET	digital event timer
DET	direct energy transfer
DETA	diethylene triamine
DETEC	defensive technology evaluation code
DETIR	Defensive Technology Information Repository

DEU	digital electronics unit
DEU	display electronics unit
DEU-KYBD	display electronics unit equivalent inputs
DEW	directed-energy weapon
DEW	distant early warning
DF	development flight
DF	development forward
DF	direct flight
DF	direction finder
DF	disassembly facility
DF	double feeder
DF	drawing file
DF	drop forge
DF	Project Management (KSC DE directorate)
DF-SPE-A	Shuttle Project Engineering Office
DF/CMB	data formatter and command monitor bus
DFCS	digital flight control software
DFCS	digital flight control system
DFD	data flow diagram
DFE	data flow engineer
DFE	direction-finding equipment

DFE	distributed framework executive
DFG	diode function generator
DFG	display format generator
DFI	development flight instrumentation
DFI	development flight integration
DFIS	DFI subsystem
DFL	decommutator format load
DFRF	Dryden Flight Research Facility
DFS	directional finding system
DFS	dynamic flight simulator
DFT	design for testability
DG	Data General
DG	data group
DG	data good
DG	display generator
DG	double groove
DGU	digital graphics unit
DGU	display generator unit
DGZ	desired ground zero
DH	decision height
DHA	design hazards analysis

DHE	data handling equipment
DHP	developed horsepower
DHS	discrete horizon sensor
DI	data integrator
DI	desk instruction
DI	discrete input
DI	driving issue
DIA	Defense Intelligence Agency
DID	data item description
DID	defense in depth
DIDS	defense integrated data system
DIDSIM	defense-in-depth simulation
DIDTHT	defense-in-depth threat
DIEU	digital interface electronics unit
DIGIKON	digital control analysis software
DIH	discrete input high
DII	defense industry initiative
DIL	deliverable items list
DIL	discrete input low
DILSA	distributed integrated logistics support analysis
DIM	design impact meeting

DIM	Design Information Manual
DIM	Design Interface Meeting
DINS	defense inertial navigation system
DIP	data integrated plan
DIP	designated inspection point
DIP	detailed integration plan
DIP	display input processor
DIP	display interface processor
DIPEC	Defense Industrial Plant Equipment Center
DIPL	display initial program load
DIPS	dynamic isotope power system
DIR	document information record
DIS	Defense Investigative Service
DIS	defense industrial security
DIS	documentation index system
DISCO	Defense Industrial Security Clearance Office
DISP	dispersive spectrometer
DIT	data ID table
DIT	display index table
DIT	dynamic integrated test
DITMCO	Drive-In Theater Manufacturing Company's wire harness insulation analyzer

DITMO	development, integration, test, and mission operations
DIU	data interface unit
DIU	digital interface unit
DK	display keyboard
DKC	design knowledge capture
DL	developed length
DL	development left
DL	downlink
DL	drawing list
DL	Electronics Engineering (KSC DE directorate)
DLAT	destructive lot acceptance testing
DLC	delay line control
DLC	direct lift control
DLH	direct labor hour
DLO	director of launch operations
DLSC	Defense Logistics Service Center
DLSM	data link summary message
DLTR	data link terminal repeater
DLTR	data link transmission repeater
DM	data management
DM	docking mechanism

DM	docking module
DM	data manager
DM	data manual
DM	deformable mirror
DM	delta modulation
DM	design manual
DM	design margin
DM	detached module
DM	development motor
DMA	data management administrator
DMA	data management assembly
DMA	Defense Mapping Agency
DMA	direct memory access
DMA	drive motor assembly
DMC	data management computer
DMC	direct maintenance cost
DMCF	deservicing, maintenance, and checkout facility
DMCM	double-density modular core memory
DME	distance measuring equipment
DME	dynamic mission equipment
DMES	dimethylethoxys

DMF	depot maintenance facility
DMG	Data Management Group
DMICB	Daily Mission Integration Control Board
DMIS	data management information system
DML	developmental instrumentation, MDM left
DMM	developmental instrumentation, MDM mid
DMMH	direct maintenance man-hours
DMON	discrete monitoring
DMOS	diffusive mixing of organic systems
DMP	data management processor
DMP	data merger processor
DMP	DEU message processor
DMPI	desired mean point of impact
DMR	developmental instrumentation, MDM right
DMS	data base management system
DMS	data management system (subsystem)
DMS	deliverables management system
DMS	design management system
DMS	docking mechanism subsystem
DMS	docking module system (subsystem)
DMS	DRD management system

DMS	DRL management system
DMS	dynamic motion simulator
DMSIF	DMS Integration Facility
DMSP	Defense Meteorological Satellite Program
DMSS	data management system simulator (CVT)
DMSS	defense meteorological satellite system
DMSSIM	DMS simulation
DN	Department of the Navy
DN	discrepancy notice
DNA	Defense Nuclear Agency
DNA	does not apply
DNC	direct numerical control
DNO	descending-node orbit
DNS	departure nuclear stage
DO	discrete output
DOA	Department of Agriculture
DOAMS	distant-object attitude-measuring system
DOC	Department of Commerce
DOC	direct operating cost
DOC	drift-orbit correction
DOD	Department of Defense

DOD	depth of discharge
DOD-STP	Department of Defense standard satellite
DODI	DOD instruction
DODISS	Department of Defense Index of Specifications and Standards
DOE	Department of Energy
DOF	degree of freedom
DOF	direction of flight
DOH	discrete output high
DOI	descent orbit insertion
DOI	direct orbit insertion
DOL	day of launch
DOL	Department of Labor
DOL	discrete output low
DOM	development operations manager
DOMSAT	domestic satellite
DOP	detailed operating procedure
DORIS	determination of orbit radio positioning integrated from Shuttle (French-supplied dual-frequency receiver)
DOS	digital operation system
DOS	disk operating system
DOT	data output tape
DOT	Department of Transportation

DOT	deployment operations team
DOT/CIAP	DOT climatic impact assessment program
DOVAP	Doppler velocity and position
DOY	day of year
DP	dash pot
DP	diametral pitch
DP	differential pressure
DP	double pole
DP	data processing
DP	data processor
DP	data product
DP	deflection plate
DP	delayed procurement
DP	design proof
DP	development phase
DP	dew point
DP&S	data processing and software
DP&SS	data processing and software subsystem
DP/DT	delta pressure/delta time
DPA	data processing assembly
DPA	destructive physical analysis

DPA	division planning authorization
DPAS	defense priorities and allocation system
DPC	data processing center
DPCL	dedicated payload communication link
DPCS	distributed process construction system
DPD	data procurement document
DPDM	differential pulse-duration modulation
DPDO	Defense Property Disposal Office
DPDS	distributed processing design system
DPDT	double pole, double throw
DPG	dual-purpose gyro
DPI	detail program interrelationship
DPM	deputy program manager
DPP	deployment/pointing panel
DPR	definition phase review
DPRS	docking probe retraction system
DPS	data processing and software
DPS	data processing system (subsystem)
DPS	Department of Defense project specification
DPS	descent propulsion system
DPS	digital processing system

DPSD	Data Processing Systems Division
DPSK	differential phase shift keying
DPSS	data processing and software subsystem
DPSS	data processing software system
DPST	double pole, single throw
DPT	design proof test
DPU	data processing unit
DPU	digital processing unit
DQPSK	differential quaternary phase shift keying
DR	data register
DR	disposition report
DR	data requester
DR	data requirement
DR	dead reckoning
DR	design review
DR	development right
DR	discrepancy report
DR	dispatch reliability
DR	disposition record
DR&A	data requirements and analysis
DR/MR	discrepancy report/material review

DRA	document release authorization
DRAM	dynamic random access memory
DRAT	data requirements analysis tool
DRB	Design Review Board
DRB	design requirements baseline
DRC	data reduction center
DRC	discrete rate command
DRD	data requirements description
DRD	data requirements document
DRD	design requirements document
DRD	detailed requirements document
DRD	document requirement description
DRF	data request form
DRF	digital radio frequency
DRG	digital ranging generator
DRI	data rate indicator
DRK	display request keyboard
DRL	data requirements list
DRL	document requirements list
DRL	double-rack laboratory
DRM	data records management

DRM	Design Reference Mission
DRM	Design Requirements Manual
DRM	Drafting Room Manual
DRM	Drawing Requirements Manual
DRMR	disposition report on MR
DRO	destructive readout
DRO	document release order
DRR	data recorder or reproducer
DRR	design requirements review
DRRD	design requirements review disposition
DRS	data recording system
DRS	data relay satellite
DRS	data relay station
DRS	digital range safety
DRS	discrepancy report squawk
DRS	donning and recharge system
DRS	dynamic restringing
DRSCS	digital range safety command system
DRSS	data relay satellite system
DRSS	discrepancy report squawk sheet
DRT	deployment readiness test

DRT	design reference trajectory
DRUC	disposition record unsatisfactory condition
DS	data storage
DS	design sheet
DS	docking system
DS&R	data storage and retrieval
DS-RPIE	direct support real property installed equipment
DS3	deep-space surveillance system
DSA	Defense Supply Agency
DSA	demonstration structural article
DSAD	Data Systems and Analysis Directorate (JSC)
DSARC	Defense System Acquisition Review Committee
DSARC	Defense Systems Acquisition Review Council
DSAT	defensive satellite
DSB	document status bulletin
DSB	double side-band
DSC	data separator card
DSC	dedicated signal conditioner
DSC	differential scanning calorimeter
DSCIM	display system computer input multiplexer
DSCN	design and simulator computation network

DSCS	defense satellite communications system
DSCS	defense support communication satellite
DSCU	digital computer switching unit
DSD	defensive shields demonstration
DSDU	data storage distribution unit
DSE	data storage encoder
DSE	data storage equipment
DSE	development support equipment
DSEA	data storage electronics assembly
DSFT	distributed system fault tolerance
DSI	distributed system integration
DSIF	Deep-Space Instrumentation Facility
DSIFE	DSIF equipment
DSIS	defense satellite information system
DSKY	display keyboard
DSL	design specification list
DSM	data system(s) modernization
DSN	data steering network
DSN	deep-space network
DSN	digital switching network
DSN	diminishing source notice

DSO	design secondary objective
DSO	detailed secondary objective
DSO	detailed supplementary objective
DSP	defense support program
DSP	digital signal processing
DSPM	designated subsystem project manager
DSR	data storage and retrieval
DSS	data support system
DSS	DCDS support system
DSS	decision support system
DSS	deep-space station
DSS	deliverable survival shelter
DSS	department summary schedule
DSS	documentation support services
DSSM	dedicated solar sortie mission
DST	defense suppression threat
DST	dimensional special tooling
DSTF	Delta Spin Test Facility
DT	delayed time
DT	double throw
DT	drop tank

DT&E	development, test, and evaluation
DT&O	data, test, and operation
DTA	daisy testability analyzer
DTA	development test article
DTA	differential thermal analyzer
DTC	design to cost
DTCS	digital test command system
DTCW	data transfer command word
DTE	data transmission equipment
DTE	deliverable test equipment
DTE	digital television equipment
DTF	Development Test Facility (Ford Aerospace)
DTI	development test instrumentation
DTIC	Defense Technical Information Center
DTLCC	design to life cycle cost
DTMO	development, test, and mission operations
DTMS	development, test, and mission support
DTMS	digital test measurement system
DTMS	digital test monitor system
DTO	design test objective
DTO	detailed test objective

DTP	detailed test plan
DTP	detailed test procedure
DTP	development test plan
DTRD	development test requirements document
DTS	data transfer system
DTS	data transmission system
DTS	Defense Technology Study
DTS	Defensive Technologies Study
DTS	development test sensor
DTSL	Data Transfer Systems Laboratory
DTST	Defense Technology Study Team
DTST	Defensive Technologies Study Team
DTT	design test tool
DTU	development test unit
DTV	developmental test vehicle
DTV&I	development, test, verification, and integration
DTVC	data transmission and verification converter
DTVC	digital transmission and verification converter
DU	display unit
DUA	digital uplink assembly
DUC	digital uplink command

DUC	display use chain
DUNS	Data Universal Numbering System
DV	designated verification
DV	designee for verification
DVD	delta velocity display
DVE	design verification experiment
DVM	digital voltmeter
DVO	delta velocity on/off
DVS	delta velocity system
DVS	design verification specification
DVS	digital voice system
DVT	design verification testing
DVU	delta velocity ullage
DW	data word
DW	developed width
DW	distilled water
DW	double weight
DWI	data word in
DWS	disaster warning satellite
DWT	dog wags tail
DYB	dynamic braking

E	elastic modulus
E	elevation angle
E&D	engineering and development
E&D	evaluation and development
E&DSG	Electro-Optical and Data Systems Group
E&L	engineering and lab
E&M	electrical and mechanical
E&O	engineering and operations
E-E	end to end
E-O	electro-optic
E-mail	electronic mail
E/B	equipment bay
E/C	encoder coupler
E/D	edge distance
E/L	entry/landing
E/M	engineering model
E/M	escape motor
E/O	engineering/operations
E/OCM	electromagnetic/optical countermeasure
E/P	electron/proton
E/W	energy-to-weight ratio

EA	electronics assembly
EA	elevation angle
EAC	early analysis capability
EAC	employee action circle
EAC	energy-absorbing capacity
EAC	estimate at completion
EAC	experiment apparatus container
EAC	experimental apparatus canister
EACE	early analysis capability enhanced
EAD	electrically alterable device
EADI	electronic attitude director indicator
EADS	engineering analysis and data systems
EADT	experiment agency data tape
EAF	engineering analysis facility
EAF	engineering analysis function
EAFB	Edwards Air Force Base
EAFB	Eglin Air Force Base
EAFB	Ellington Air Force Base
EAI	Electronics Associates, Incorporated
EAL	equipment airlock
EAM	electrical accounting machine

EAM	emergency action message
EAP	Employee Assistance Program
EAR	engineering action request
EAR	engineering analysis report
EAR	environmental analysis report
EAROM	electrically alterable read-only memory
EAS	engine actuation system
EAS	equivalent airspeed
EASE	electric automatic support equipment
EASE	expert activity scheduling environment
EAT	environmental acceptance test
EATR	extravehicular assist teleoperator robot
EB	electronic beam
EB	emergency box
EB	equipment bay
EB	expendable booster
EBC	emulated buffer computer
EBCDC	extended binary-coded decimal
EBD	eyeballs down (+GZ)
EBI	eyeballs in (+GX)
EBL	eyeballs left (+GY)

EBO	eyeballs out (-GX)
EBR	eyeballs right (-GY)
EBS	emergency breathing subsystem
EBU	eyeballs up (-GZ)
EBW	exploding bridge wire
EC	elastic center
EC	events coupler
EC	experiment computer
EC	element contractor
EC	enabling command
EC	engine control
EC	engine cutoff
EC	engineering change
EC	equipment change
EC	essentiality code
EC	events controller
ECA	electronic computer assembly
ECA	electronic control assembly
ECA	engine control assembly
ECA	engineering change analysis
ECA	epoxy curing agent

ECAS	experiment computer application software
ECB	Engineering Change Board
ECB	event control block
ECB	event controlled block
ECB	events control buffer
ECC	engineering change control
ECC	engineering critical component
ECCAP	electromagnetic compatibility circuit analysis program
ECCAP	electromagnetic compatibility computerized analysis
ECCAP	electromagnetic compatibility computer analysis proposal
ECCB	Engineering Change Control Board
ECCCS	emergency command control communications system
ECCM	electronic counter-countermeasure
ECCP	experiment configuration control panel
ECD	engineering control drawing
ECD	entry corridor display
ECD	estimate at completion change document
ECD	estimated completion date
ECDU	electronic coupling display unit
ECF	equivalency capability file
ECG	electrocardiogram

ECG	electrocardiograph
ECG	electrocardiography
ECG	electroepitaxial crystal growth
ECI	Earth-centered inertia
ECI	employment cost index
ECK	emergency communication key
ECL	electronic circuit logic
ECL	emitter coupled logic
ECLS	environmental control and life support
ECLSS	environmental control and life support system
ECM	electromagnetic countermeasure
ECM	electronic countermeasure
ECM	engineering change management
ECM	error correcting memory
ECN	engineering change notice
ECO	electron-coupled oscillator
ECO	engine combustion
ECO	engine cutoff
ECO	engineering change order
ECOS	experiment computer operating system
ECP	engineering change proposal

ECP	engineering control program
ECP	explicitly coded program
ECR	engineering change request
ECR	equipment change record
ECR	experiment change record
ECR	experiment concept review
ECRA	engineering change request authorization
ECRC	Engineering Contract Requirements Committee
ECRV	exponentially corrected random variable
ECS	effective cross section
ECS	electrical control station
ECS	engine control system
ECS	environmental control system
ECSS	extendable computer system simulator
ECT	experiment command tape
ECU	electrical control unit
ECU	electrical conversion unit
ECU	electronic coupling unit
ECU	engine control unit
ECU	environmental control unit
ECU	extreme closeup

ED	edge distance
ED	Engineering Directorate
ED	Engineering Division
ED	engineering directive
ED	explosive device
EDA	electronic display assembly
EDA	elevation drive assembly
EDAC	error detection and correction
EDB	environmental data book
EDC	Engineering Data Center
EDC	engineering design change
EDCAS	equipment designer's cost analysis system
EDCC	Engineering Drawing Control Center
EDCP	engineering design change proposal
EDCS	electrical distribution and control system
EDDF	error detection and decision feedback
EDDR	electron dipole-dipole reservoir
EDF	engineering data file
EDI	electronic data interchange
EDI	electronic data interfacing
EDIV	engineering design intent verification

EDL	Engineering Development Laboratory
EDLN	engineering development logic network
EDLS	engineering drawing library system
EDM	electrical discharge machining
EDM	engineering development model
EDMS	electronic data management system
EDO	extended-duration orbiter
EDP	electronic data processing
EDP	embedded data processor
EDPC	Electronic Data Processing Center
EDPE	electronic data processing equipment
EDPL	Engineering Development Processor Laboratory
EDPM	electronic data processing machine
EDR	engineering design review
EDS	electrical distribution system
EDS	emergency detection system (subsystem)
EDS	engineering data system
EDS	engineering design system
EDS	engineering development schedule
EDS	executive data base system
EDS	explosive device system

EDSC	early deployment system concept
EDT	eastern daylight time
EDT	electronic theodolite system
EDTS	electronic data transfer system
EDV	electric depressurization valve
EDV	electronic depressurizing valve
EDW	Edwards (TACAN station)
EE	emergency engineering
EE	end effector
EE	experimental evaluation
EECOM	electrical, environmental, and communications
EECOM	electrical, environmental, consumables, and mechanical
EED	electroexplosive device
EEE	electronic, electrical, and electromechanical
EEEU	end effector electronics unit
EEG	electroencephalogram
EEG	electroencephalograph
EEG	electroencephalography
EEH	EMU electrical harness
EEI	Edison Electrical Institute
EEI	essential elements of information

EEL	electrical equipment list
EEM	Earth entry module
EENT	eye, ear, nose, and throat
EEO	Equal Employment Office
EEO	equal employment opportunity
EEP	electronic equipment package
EEPROM	electrically erasable read-only memory
EES	ejection escape suit
EES	emergency ejection suit
EES	escape ejection suit
EESS	emergency egress severance system
EESS	emergency egress slide system
EET	electronic control assembly engine thrust
EET	entry elapsed time
EET	equivalent exposure time
EETB	electronic/electrical termination building
EEU	extravehicular excursion unit
EEWS	emergency egress window system
EF	electronic field
EFA	experiment flight application
EFCS	Earth-fixed coordinate system

EFE	electronic field experiment
EFFGRO	efficient growth (computer program)
EFL	effective focal length
EFL	equivalent focal length
EFP	ESA-furnished property
EFSSS	engine failure sensing and shutdown system
EFTO	encrypted for transmission only
EGA	evolved gas analysis
EGB	electronic gimbal box
EGC	experiment ground computer
EGF	electrical grapple fixture
EGIL	electrical, general instrumentation, and lighting
EGO	eccentric geophysical observation
EGORD	Experiment Ground Operations Requirements Document
EGRET	energetic Gamma Ray Explorer telescope
EGSE	electrical ground support equipment
EGT	elapsed ground time
EGT	estimated ground time
EGT	exhaust gas temperature
EH/M	extension hose mouthpiece
EHA	electrohydraulic actuator

EHC	electrical heating control
EHF	extremely high frequency
EHOT	external hydrogen/oxygen tank
EHP	effective horsepower
EHP	electrical horsepower
EHS	environmental health services
EHSD	existing hardware/software data base
EHX	experiment-dedicated heat exchanger
EI	electronics interface
EI	end item
EI	engineering instruction
EI	entry interface
EI	environmental impact
EIA	Electrical Industries Association
EIASN	end item assembly sequence number
EIAT	end item acceptance test
EIC	Engineering Information Center
EIC	experimental intercom
EICD	experiment interface control document
EID	end item documentation
EIDP	end item data package

EIFA	element interface functional analysis
EIM	engineering information management
EIR	environmental impact report
EIR	experiment integration review
EIRP	effective isotropic radiated power
EIS	electrical integration system
EIS	end item specification
EIS	engineering information system
EIS	environmental impact statement
EIT	entry interface time
EIU	engine interface unit
EIVT	electrical and instrumentation verification test
EIVT	electrical interface verification test
EIVT	electronic installation verification test
EIWB	end item workbook
EKF	extended Kalmar filter
EKG	electrocardiogram
EKG	electrocardiograph
EKG	electrocardiography
EL	elastic limit
EL	electroluminescence

EL	equipment laboratory
ELACS	extended-life attitude control system
ELB	electrical load bank
ELC	Earth limb clutter
ELDV	electrically operated depressurization valve
ELE	Earth limb experiment
ELF	extremely low frequency (1 Hz to 3 kHz)
ELINT	electronic intelligence satellite
ELM	experimental logistics module
ELMS	elastic-loop mobility system
ELN	Digital Equipment Corporation's real-time operating sn
ELP	English language program
ELRAD	Earth limb radiance
ELS	eastern launch site
ELS	elevon load system
ELS	external lighting system
ELT	emergency locator transmitter
ELV	Earth launch vehicle
ELV	expendable launch vehicle
EM	electromagnetic
EM	engineering model

EM	exception monitor
EM&IAS	electromechanical and integrated avionics subsystem
EMA	electromagnetic analysis
EMA	electromechanical actuator
EMA	engineering and manufacturing aid
EMC	electromagnetic capability
EMC	electromagnetic compatibility
EMC	electromagnetic control
EMC	equivalent mission cycle
EMCC	Emergency Mission Control Center
EMCD	electromechanical control diagram
EMCFA	electromagnetic compatibility frequency analysis
EMCI	engineering model configuration inspection
EMCON	emission control
EMD	entry monitor display
EMDM	enhanced multiplexer/demultiplexer
EMEC	electromagnetic effects capability
EMEC	electromagnetic effects compatibility
EMEC	enhanced master events controller
EMES	electrical, mechanical, and environmental systems
EMF	electromotive force

EMG	electromyogram
EMG	electromyograph
EMG	electromyography
EMI	electromagnetic interface
EMI	electromagnetic interference
EMISM	electromagnetic interference safety margin
EMK	emergency medical kit
EML	Electromagnetic Laboratory
EML	electromagnetic launcher
EMM	electromechanical mockup
EMMA	expert missile maintenance aid
EMMA	expert missile maintenance aim
EMN	engineering management network
EMON	exception monitoring
EMP	electromagnetic pulse
EMP	enhanced MDM pallet
EMP	equipment mounting plate
EMPGS	electromechanical power generation subsystem
EMR	Eastern Missile Range
EMR	engine mix ratio
EMR	engine mixture ratio

EMR	executive management review
EMRL	equipment maintenance requirements list
EMRLD	excimer moderate Raman-shifted laser device
EMS	electromagnetic susceptibility
EMS	engineering master schedule
EMS	entry monitor subsystem
EMS	entry monitoring system
EMSP	enhanced modular signal processor
EMT	electrical metallic tubing
EMU	engineering model unit
EMU	extended memory unit
EMU	extravehicular mobility unit
EMWA	engineering minor work authorization
ENDF	evaluated neutron data file
ENG	electronystagnogram
ENS	en route nuclear shuttle
ENVIRON	space natural environment model
EO	Earth observation
EO	Earth orbit
EO	electro-optic
EO	electro-optics

EO	Electronic Operations
EO	engine-out
EO	engineering order
EOAS	engineering order accountability system
EOC	early operational capability
EOC	edge of coverage
EOC	Electro-Optical Center
EOC	end of contract
EOC	engine order capability
EOC	engine-out capability
EOCM	electro-optical countermeasure
EOCR	engineering order control record
EOD	estimated on dock
EOD	explosive ordnance disposal
EODB	end of data block
EODRS	Earth observation data retrieval system
EOF	end of file
EOG	electroculogram
EOHT	external oxygen and hydrogen tank
EOI	Earth orbit insertion
EOL	Earth orbit launch

EOL	end of life
EOL	end of line
EOM	Earth orbital mission
EOM	end of message
EOM	end of mission
EOM	Engineering Operations Manual
EOM	equation of motion
EOMF	end of minor frame
EOP	Earth and ocean physics
EOP	emergency oxygen pack
EOPAP	Earth and ocean physics application program
EOPF	end of powered flight
EOPR	engineering order purchase request
EOPR	engineering order purchase requisition
EOQ	economic order quantity
EOQ	end of quarter
EOR	Earth orbit rendezvous
EOR	end of refresh
EORQ	engineering order request for quotation
EORSAT	electronic ocean reconstruction satellite
EOS	Earth observation satellite

EOS	Earth-orbit Shuttle
EOS	electrophoretic separation
EOS	emergency oxygen system
EOS	extended operating system
EOSH	electro-optical sensor hardening
EOSS	Earth-orbital space station
EOSS	extravehicular activity operational slide-wire system
EOT	end of tape
EOT	end of transmission
EOTF	engineering order to follow
EOTS	electro-optical threat sensor
EOW	energy over weight
EP	elbow pitch
EP	electrical power
EP	equivalent person
EP	equivalent personnel
EP	experiment planning
EP&PS	electrical power and pyrotechnics subsystem
EPA	engineering personnel authorization
EPA	engineering project authorization
EPA	Environmental Protection Agency

EPA	estimated plan of action
EPC	electronic parts control
EPC	error protection code
EPC	external power contractor
EPCDC	electrical power conditioning, distribution, and control
EPD	electrical power distribution
EPD	emergency procedures document
EPD&C	electrical power distribution and control
EPD&CS	electrical power distribution and control subsystem
EPDB	experiment power distribution box
EPDC	electrical power distribution and control
EPDCS	electrical power distribution and control system
EPDM	ethylene propylene diene monomer
EPDS	electrical power distribution system
EPDU	electrical power distribution unit
EPG	electrical power generator
EPGCS	electrical power generation and control subsystem
EPGS	electrical power generation subsystem
EPIRSS	extended-performance infrared search set
EPL	electrical power level
EPL	electronic, electrical, and electromechanical parts list

EPL	emergency power level
EPL	expected power level
EPM	engineering project manager
EPMS	engineering performance management system
EPO	element project office
EPOC	External Payload Operations Center
EPPSS	electrical power/pyro sequential system
EPR	engine pressure ratio
EPR	engineering purchase request
EPRN	emergency program release notice
EPROM	erasable programmable read-only memory
EPS	electrical power system (subsystem)
EPS	emergency power system
EPS	experimental power supply
EPSP	experiment power switching panel
EPSTF	Electrical Power System Test Facility
EPT	emergency procedure trainer
EPT	environmental proof test
EPT	ethylene propylene terpolymer
EPT	external pipe thread
EPTU	events per time unit

EPWG	Environmental Projects Working Group
EPWG	Experiment Planning Working Group
EPY	electronic control assembly pitch and yaw
EQE	event queue element
ER	established reliability
ER	explanation report
ER	extended reliability
ER&I	engine receiving and inspection
ERA	electrical replaceable assembly
ERA	element-relationship-attribute
ERAP	Earth resources aircraft program
ERB	Engineering Review Board
ERBACT	ERB action item
ERBM	extended-range ballistic missile
ERBS	Earth radiation budget satellite
ERC	Employee Recognition Center
ERC	event recorder
ERCAR	electrochemically regenerable CO2 absorber and
ERCB	Energy Resources Control Board
ERCM	engineering requirements and change management
EREP	Earth resources package

ERETS	Edwards rocket engine test site
ERG	electroretinogram
ERG	electroretinograph
ERG	electroretinography
ERIM	Environmental Research Institute of Michigan
ERINT	exoatmospheric reentry vehicle interceptor
ERIS	endoatmospheric reentry vehicle interceptor system
ERIS	exoatmospheric research interceptor system
ERISA	Employee Retirement Income Security Act
ERM	executive review meeting
ERNO	Entwicklungts Ring Nord Organization, Space Division of Eum, VFW-Fokker-Mannheim, Germany (Spacelab contractor)
ERO	engineering release operation
ERP	educational reimbursement program
ERP	effected radiative power
ERP	effective radiation power
ERP	elevator reference plane
ERP	eye reference point
ERR	electrical resistance requirement
ERR	engineering release record
ERRC	expendability, recoverability, and repair capability
ERRP	equipment replacement and refurbishment plan

ERS	engineering release system
ERS	entry and recovery simulation
ERSI	elastomeric reusable surface insulation
ERSIR	Earth resources Shuttle imaging radar
ERTG	economic radioisotope thermoelectric generator
ERTS	Earth resources technology satellite
ERU	Earth rate unit (15 deg/hr)
ERV	experimental reentry vehicle
ERV	expiratory reserve volume
ES	Earth sensor
ES	Electrochemical Society
ES	engineering specification
ES	equal section
ES	escape system
ES	experiment segment
ES	expert system
ESA	engineering supply area
ESA	engineering support area
ESA	engineering system assembly
ESA	European Space Agency
ESA	explosive safe area (KSC)

ESB	essential switching box
ESCA	electron spectroscopy for chemical analysis
ESCS	electronic spacecraft simulator
ESD	Electronic Systems Division (NASA)
ESD	Electronics Systems Division (USAF)
ESD	electrostatic discharge
ESD	emergency shutdown
ESD	Experiment Systems Division
ESDAC	European Space Data Center (Darmstadt, Germany)
ESDP	external sensor data processing
ESDU	event storage and distribution unit
ESE	electrical support equipment
ESE	electronic support equipment
ESE	engineering support equipment
ESE	EVA support equipment
ESF	explosive safe facility
ESI	electrical system integration
ESM	electronic support measure
ESM	energy storage module
ESM	environmental systems monitor
ESM	experiment support module

ESMC	Eastern Space and Missile Center
ESMCR	Eastern Space and Missile Center regulation
ESMS	environmental and special measurements systems
ESO	event sequence override
ESOC	European Space Operations Center
ESOW	engineering statement of work
ESP	economic simulation program
ESP	electroshock protection
ESP	Employee Suggestion Program
ESP	engineering simulator program
ESP	environmental sensing platform
ESP	experiment sensing platform
ESPS	experiment segment pallet simulator
ESR	effective sunrise
ESR	engineering support request
ESR	equipment status report
ESRIN	European Space Research Institute
ESRO	European Space Research Organization
ESS	early space station
ESS	effective sunset
ESS	emergency survival system

ESS	energy storage subsystem
ESS	environmental support system
ESS	equipment support section
ESS	experiment subsystem simulator
ESSA	electrically steerable spherical array
ESSA	Environmental Sciences Services Administration
ESSC	Engineering Support Services Contract
EST	eastern standard time
ESTA	escape system test article
ESTEC	European Space Technology Center
ESTF	Electronic System Test Facility (NASA)
ESTL	Electronic Systems Test Laboratory
ESU	eyepiece storage unit
ESV	emergency shutoff valve
ESVS	escape suit ventilation system
ESVS	escape system ventilation system
ESW	engine status word
ET	edge thickness
ET	elapsed time
ET	element test
ET	elevated temperature

ET	event timer
ET	external tank
ETA	engineering test article
ETA	estimated time of arrival
ETA	estimated time to acquisition
ETA	explosive transfer assembly
ETA	external tank attachment
ETB	equipment transfer bag
ETC	Earth terrain camera
ETC	estimate to completion
ETC	estimated cost to complete
ETC	Greenbelt, Maryland (STDN site)
ETCO	equipment transfer/change order
ETD	electrical terminal distributor
ETD	estimated turnover date
ETD	evolutionary terminal defense
ETD	external tank door
ETE	end to end
ETEDB	external thermal environment data base
ETEEM	end-to-end engagement model
ETEEM	end-to-end engineering model

ETF	Eglin Test Facility
ETI	elapsed-time indicator
ETIC	estimated time in commission
ETL	Environmental Test Laboratory
ETLOW	external tank lift-off weight
ETM	elapsed-time meter
ETM	engineering test model
ETO	Earth to orbit
ETO	ethylene oxide
ETOC	estimated time of correction
ETP	engineering test phase
ETP	environmental test plan
ETP	equipment test plan
ETPY	electronic control assembly thrust vector pitch and yaw
ETR	Eastern Test Range
ETROD	Eastern Test Range operations directive
ETRR	environmental test readiness review
ETS	electrical test set
ETS	energy transfer system
ETS	external tank system (subsystem)
ETSS	external tank separation subsystem

ETT	estimated time of track
ETUD	external tank umbilical disconnect
ETV	electrical test vehicle
ETVA	external tank vent arm
EU	electronic unit
EU	engineering unit
EU	experimental unit
EURECA	European retrievable carrier
EUROCOMSAT	European consortium communications satellite
EUV	extreme ultraviolet
EUVE	extreme ultraviolet experiment
EV	earned value
EV	entry vehicle
EV	expendable vehicle
EV	extravehicular
EV88	Experiment Version 88 (BMC3 experiment)
EVA	earned-value analysis
EVA	extravehicular activity
EVAL	Earth-viewing applications laboratory
EVAS	extravehicular activity system
EVATA	extravehicular activity translational aid

EVC	extravehicular communications
EVCF	Eastern Vehicle Checkout Facility
EVCON	events control (controller)
EVCS	extravehicular communications system
EVCU	extravehicular communications umbilical
EVD	external visual display
EVDE	external visual display equipment
EVF	equipment visibility file
EVLSS	extravehicular life support system
EVM	Earth-viewing module
EVMU	extravehicular mobility unit
EVO	engineering verification order
EVS	equipment visibility system
EVS	extravehicular suit
EVSC	extravehicular suit communications
EVSS	extravehicular space suit
EVSTC	extravehicular suit telecommunications
EVSU	extravehicular space unit
EVT	extravehicular transfer
EW	electronic warfare
EWA	estimated warehouse arrival

EWE	emergency window escape
EWM	engineering wring-out meeting
EWO	engineering work order
EWR	engineering work request
EWW	extended workweek
EXC	experiment computer
EXCABL	expert cable (automated payload cabling system)
EXH	exchange hardware
EXMATCH	expert drawing matching system
EXO	experiment operator (in Spacelab)
EXT	experiment terminal (operator console on Spacelab)
EXTRAJ	ascent trajectory (design expert system)
F	Fahrenheit
F	farad
F	floating point
F	force
F&A	fabrication and assembly
F&D	fill and drain
F&E	facility and environment
F&IE	facilities and industrial engineering
F&M	force and moment

F&P	fluids and propulsion
F&PC	finance and program control
F-F	face-to-face
F/A	fabrication and assembly
F/A	failure analysis
F/A	fuel-to-air ratio
F/C	fire control
F/C	fit check
F/C	flight control
F/C	flow control
F/C	fuel cell
F/D	face of drawing
F/D	field of drawing
F/D	fill/drain
F/E	full/empty
F/F	fill/full
F/O	fuel oxidizer
F/R	flared rudder
FA	factor analysis
FA	failure analysis
FA	feedback analysis

FA	final approach
FA	final assembly
FA	flight acceptance
FA	flight aft
FA	flight-critical aft
FA	fully automatic
FA<	first approach and landing test
FA/COSI	final assembly closeout systems installation
FAA	false alarm avoidance
FAA	Federal Aviation Administration
FAB	flight assignment baseline
FABU	fuel additive blender unit
FACC	Ford Aerospace and Communications Corporation
FACI	first-article configuration inspection
FACO	fabrication and acceptance checkout
FACO	factory acceptance checkout
FACO	factory assembly and checkout
FACO	final assembly checkout
FACR	first-article configuration review
FACS	finance and control system
FACT	first-address control table

FACT	flexible automatic circuit tester
FACT	flight acceptance composite test
FACTS	FDF automated control and tracking system
FAD	final approach display
FAD	flight assessment delta
FAE	final approach equipment
FAF	final assembly fixture
FAF	first aerodynamic flight
FAFS	Falcon Air Force Station
FAIR	fabrication, assembly, and inspection record
FAIR	fly-along infrared
FAL	facility area layout
FAL	first approach and landing
FAME	formatting and multiplexing equipment
FAMOS	flight acceleration monitor system
FAMS	FDF automated monitoring system
FAMU	fuel additive moisture unit
FAO	flight activities officer
FAP	final approach plane
FAP	FORTRAN assembly program
FAPE	Florida Association of Professional Employees

FAR	failure analysis report
FAR	Federal Aviation regulation
FAR	federal acquisition regulation
FAR	final acceptance review
FAR	flight acceptance review
FAR	flight analysis review
FAS	flight analysis system
FAS	forward acquisition sensor
FASCOS	flight acceleration safety cutoff system
FAT	factory acceptance test (some subcontractors)
FAT	final acceptance test (Rockwell)
FAT	flight attitude table
FAWG	Flight Assignment Working Group
FB	feedback
FB	field bulletin
FB	final braking
FB	flat bar
FB	fleet broadcast
FBAS	fixed-base aft station
FBB	flyback booster
FBC	fluidized-bed combustion

FBCS	fixed-base crew station (SMS)
FBM	fleet ballistic missile
FBV	field-base visit
FBV	fuel bleed valve
FC	facility control
FC	ferrite core
FC	fire control
FC	fit check
FC	flight computer
FC	flight control
FC	flight critical
FC	fuel cell
FCA	field change analysis
FCA	flow control assembly
FCA	forward controller assembly
FCA	frequency control analysis
FCA	functional compatibility analysis
FCA	functional configuration audit
FCAF	Flight Crew Accommodation Facility
FCAP	flight control applications program
FCB	Fracture Control Board

FCC	Federal Communications Commission
FCC	flat conductor cable
FCCP	firm contract cost proposal
FCD	Flight Control Division (NASA)
FCDB	flight control data bus
FCDC	flexible confined detonating cord
FCDR	final critical design review
FCE	fast-cycle executive
FCE	flight control equipment
FCE	flight crew equipment
FCEF	Flight Crew Equipment Facility
FCEI	facility contract end item
FCEI	facility contractor end item
FCF	first captive flight
FCF	functional check flight
FCH	Flight Controller's Handbook
FCHL	Flight Control Hydraulics Laboratory
FCI	flight control indicator
FCI	flight crew integration
FCI	functional configuration identification
FCIM	flight control interface module

FCIP	flight cargo implementation plan
FCITE	FCI time element
FCL	feeder control logic
FCL	fluid coolant loop
FCL	Freon coolant line
FCL	Freon coolant loop
FCM	flow control module
FCMC	facility control and monitor console
FCMU	foot-controlled maneuvering unit
FCO	field change order
FCO	final checkout
FCO	flight crew operations
FCO	functional checkout
FCOB	Flight Crew Operations Branch (NASA)
FCOD	Flight Crew Operations Directorate
FCOH	Flight Controller's Operational Handbook
FCOS	flight computer operating system
FCOS	flight control operating system
FCOS	flight control operational software
FCP	Failure Correction Panel
FCP	firm cost proposal

FCP	flight correction proposal
FCP	fuel cell power plant
FCP	fuel cell propellant
FCPS	fuel cell power system (subsystem)
FCR	facility change request
FCR	final configuration review
FCR	flight configuration review
FCR	flight control room
FCRA	fecal collection receptacle assembly
FCRT	flight display CRT
FCS	fecal containment system
FCS	federal communications system
FCS	fire control system
FCS	flight control simulator
FCS	flight control system
FCS	flight crew system
FCS	front crew system
FCSD	Flight Crew Support Division (JSC)
FCSM	flight combustion stability monitor
FCSS	fuel cell servicing system
FCSTF	Fuel Cell System Test Facility

FCT	filament center tap
FCT	flight control team
FCT	flight controller trainer
FCT	flight crew trainer
FCT	fuel cell test
FCTB	Flight Crew Training Building
FCTF	Fuel Cell Test Facility
FCTR	flight controller training room
FCTS	flight crew trainer simulator
FCU	fluid checkout unit
FCV	flow control valve
FCW	format control word
FD	fault detection
FD	flight day
FD	flight director
FD	freeze-dried
FD	function designator
FD	functional designator
FD/FI	fault detection/fault isolation
FDA	fault detection and annunciation
FDA	flight deck assembly

FDAI	flight director attitude indicator
FDB	facility data base
FDB	Fahrenheit dry bulb
FDCF	Flight Design Control Facility
FDDB	function designator data base
FDDI	fiber distributed data interface
FDF	first drop flight
FDF	flight data file
FDI	failure detector indicator
FDI	fault detection and identification
FDI	fault detection and isolation
FDI	flight detection and isolation
FDI	flight director instrument
FDIIR	fault detection, isolation, identification, and
FDIR	fault detection, identification, and recovery
FDIR	fault detection, isolation, and recovery
FDIR	fault detection/isolation and reconfiguration
FDK	flight display keyboard
FDL	flight director loop
FDLC	final design load cycle
FDM	flight data manager

FDM	flight design manager
FDM	frequency data multiplexer
FDM	frequency division multiplexer
FDM	frequency domain multiplexer
FDMA	frequency division multiple access
FDO	fee determination official
FDO	Flight Director's Office
FDO	flight dynamics officer
FDOR	flight design operations review
FDP	Flight Design Panel
FDR	final design review
FDR	flight definition requirement
FDR	functional design review
FDRD	flight definition and requirements directive
FDRD	flight definition and requirements document
FDRD	flight determination and requirements directive
FDRI	flight director rate indicator
FDS	failure dynamics software
FDS	functional design specification
FDS	fire detection and suppression
FDS	flight design and scheduling

FDS	flight design system
FDS	flight dynamics simulator
FDS	flight dynamics software
FDS	flight dynamics support
FDS	flight dynamics system
FDS	fluid distribution system
FDSC	flight dynamics simulation complex
FDSC	flight dynamics situation complex
FDSCU	fluid distribution system control unit
FDSR	final design status review
FDT	full-duplex teletype
FDU	fluid distribution unit
FDX	simultaneous, two-way, full-duplex channel
FE	flight execution
FE	flight executive
FE	flight experiment
FE	force execution
FEA	failure effects analysis
FEA	flight experiment apparatus
FEA	fluids experiment apparatus
FEAT	final engineering acceptance test

FEB	forward equipment bay
FEB	fourth entry battery
FEB	functional electronic block
FEC	field engineering change
FEC	forward events controller
FECR	final experiment concept review
FED	flight events demonstration
FEDB	flight execution data base
FEDP	facility and equipment design plan
FEE	failure effects evaluation
FEID	flight equipment interface design
FEID	flight equipment interface device
FEID	functional engineering interface device
FEL	first-element launch
FEL	free-electron laser
FEM	finite-element method
FEM	finite-element model
FEMCPL	facilities and environmental measurement component parts
FEO	field engineering order
FEP	fluorinated ethylene-propylene
FEP	front-end processor

FEPC	flight equipment processing contractor
FERD	facility and equipment requirements document
FES	flash evaporator system
FES	flight element set
FESL	failure effects summary list
FESP	flight execution support plan
FET	field effect transistor
FET	flight elapsed time
FEWG	Flight Evaluation Working Group
FF	flight forward
FF	flight-critical forward
FF	flip-flop
FF	forecasting funding
FF	forward fuselage
FF	free flight
FF	free flyer
FF	full field
FF	full functional
FFBD	functional flow block diagram
FFC	final flight certification
FFC	first-flight capability

FFD	fixed-format display
FFD	functional flow diagram
FFF	final factory functional
FFM	free-flying (experiment) module
FFP	firm fixed price
FFP	firmed fixed price
FFR	flight feasibility review
FFRR	first flight readiness review
FFSAC	field functional systems assembly and checkout
FFT	factory functional test
FFT	fast Fourier transform
FFT	frame format table
FFTO	free-flying teleoperator
FH	flex hose
FHC	flight half-coupling
FHD	fixed-head disk
FHF	first horizontal flight
FHO	failed hardover
FHP	fuel high pressure
FHS	forward heat shield
FHST	fixed-head star tracker

FI	fault identification
FI	fault isolation
FI	field intensity
FI	formal inspection
FIA	flight integration assessment
FIAB	Flight Integration Assessment Board
FIAR	failure investigation action report
FICA	Federal Insurance Contribution Act
FID	flight implementation directive
FIE	flight instrumentation engineer
FIFO	first in/first out (high-speed data buffer)
FIIG	federal item identification guide
FIIN	federal item identification number
FIIWG	Facility Integration and Installation Working Group
FILE	feature identification and location equipment
FIM	field instruction memorandum
FIMS	framework for integrated manufacturing system
FIO	furnished and installed by others
FIR	fuel indicator reading
FIRSSE	Far Infrared Sky Survey Experiment
FIS	facility interface sheet

FISA	facility inspection shakedown acceptance
FIST	final integrated system test
FIST	functional integrated system test
FIT	fault isolation test
FITH	fire in the hole
FIV	fuel isolation valve
FKB	flight display keyboard
FL	feed line
FL	flow line
FL	forward link
FLAG	flexible assignment generator
FLAGE	Flexible Lightweight Agile Guided Experiment
FLAIR	functional language articulated interactive resource
FLAPS	flight application software
FLC	Federal Library Committee
FLC	forward load control
FLCA	forward load controller assembly
FLIR	forward-looking infrared
FLLK	frustum-lifting lug kit
FLPS	flight load planning system
FLR	flight log recorder

FLSA	Fair Labor Standards Act
FLSC	flexible linear-shaped charge
FLTSATCOM	fleet satellite communications
FLW	Fellows (TACAN station)
FM	first mold
FM	flight model
FM	fluid module
FM	fracture mechanics
FM	frequency modulated
FM	frequency modulation
FM/CW	frequency-modulated continuous wave
FM/FM	frequency modulation/frequency multiplexing
FM/PM	frequency modulation/phase modulation
FMA	failure mode analysis
FMAD	fluid management and distribution
FMAHTS	flight manifest and hardware tracking system
FMAR	final mission analysis review
FMC	forward motor controller
FMCA	forward motor controller assembly
FMCF	first manned captive flight
FMCS	Federal Mediation and Conciliation Services

FMD	fixed-module drive
FMD&C	flight mechanics, dynamics, and control
FMDM	flexible multiplexer/demultiplexer
FMEA	failure mode and effects analysis
FMEC	forward master events controller
FMECA	failure modes and effects criticality analysis
FMECA	failure modes, effects, and criticality analysis
FMK	field modification kit
FML	fault message line
FML	final materials list
FMO	flight medical officer
FMOF	first manned operational flight
FMOF	first manned orbital flight
FMOFEV	first manned orbital flight with EVA
FMOFPL	first manned orbital flight with payload
FMP	facility management plan
FMPAC	fixed multipurpose application console
FMR	field modification request
FMR	function max rate
FMS	fluid management system
FMS	food management subsystem

FMS	forms management system
FMS	functional master schedule
FMSP	FM signal processor
FMSP	frequency modulation signal processor
FMT	flight management team
FMX	FM transmitter
FND	facility need date
FNOC	Fleet Numeric Oceanography Center (U.S. Navy)
FNOC	Fleet Numerical Oceanography Center
FNT	failure notification Telex
FO	fail operating
FO	fail operational
FO	fast operating
FO	fiber-optic
FO	flat oval
FO	functional objective
FO-FO-FS	fail operational/fail operational/fail safe
FO-FS	fail operational/fail safe
FOB	Flight Operations Building
FOB	fractional orbit bombardment
FOB	free on board

FOBS	fractional orbit bombing system
FOC	fleet operational capability
FOC	full operational capability
FOCR	final operational concept review
FOD	Flight Operations Directorate (JSC)
FODS	fiber-optic demonstration system
FOE	flight operations engineer
FOF	first operational flight
FOF	first orbital flight
FOF	flight operations facility
FOG	fiber-optic gyro
FOGM	fiber-optic guided missile
FOH	first-order hold
FOI	field operations installation
FOIH	Flight Operations Integration Handbook
FOM	field operations memorandum
FOM	figure of merit
FOMR	Flight Operations Management Room
FOP	facility operations plan
FOP	Flight Operations Panel
FOP	flight operations plan

FOP	follow-on production
FOPG	Flight Operations Planning Group
FOPP	follow-on parts production
FOPS	flight operations planning schedule
FOPSS	flight operation product scheduling system
FOR	field of regard
FOR	flight operations review
FORD	flight operations requirement document
FORTRAN	formula translation
FOS	flight operation security
FOS	flight operations support
FOSA	Flight Operations Support Annex
FOSDIC	film optical sensing device for input to computers
FOSMS	facility operation scheduling and monitoring system
FOSO	flight operations scheduling officer
FOSP	flight operations support personnel
FOST	flight operations support team
FOT	flight operation trainer
FOT	flight operations team
FOV	field of view
FOV	field of vision

FOV	first orbital vehicle
FOWG	Flight Operations Working Group
FP	fine pointer
FP	fuel pressure
FP	function path
FP	functional path
FP	fine pointing
FP	fixed point
FP	fixed price
FP	flat panel
FP	flexible processor
FP	flight plan
FP	focal plane
FP	freezing point
FPA	focal plane array
FPA	focal plane assembly
FPB	fuel preburner
FPBOV	fuel preburner and oxidizer valve
FPC	Federal Power Commission
FPC	fixed-price contractor
FPC	forward power controller

FPCA	forward power controller assembly
FPDE	focal plane drive electronics
FPE	functional program element
FPEG	fast-pulse electron gun
FPH	Flight Procedures Handbook
FPI	fixed-price incentive
FPI	fuel pressure indicator
FPIF	fixed-price incentive fee
FPIT	field preinstallation test
FPL	fetch pointer list
FPL	full power load
FPO	Future Projects Office (MSFC)
FPOV	fuel preburner oxidizer valve
FPP	floating-point processor
FPP	Freon pump package
FPPR	fixed price with price revision
FPQ	fixed, special-purpose radar
FPR	flight performance reserve
FPRV	flight product requirements verification
FPSP	focal plane signal processor
FPSR	flight planning and stowage review

FPSS	fine-pointing sun sensor
FPU	floating-point unit
FPV	flow proportioning valve
FPWG	FSD Planning Working Group
FQ	flight qualification
FQF	first qualification flight
FQI	flight qualification instrumentation
FQR	final qualification review
FQR	flight qualification recorder
FQR	formal qualification review
FQT	formal qualification test
FR	fast release
FR	final review
FR	firing room
FR	flight rule
FR	force-reflective
FR	frame rate
FR	fully reusable
FRACAS	failure reporting, analysis, and corrective action
FRAGNET	fragmented network
FRB	Failure Review Board

FRC	fixed radio control
FRC	flight readiness certification
FRCB	Flight Rules Change Board
FRCB	Flight Rules Control Board
FRCI	fibrous refractory composite insulation
FRCS	forward reaction control system (subsystem)
FRD	flight requirements document
FRD	functional requirements document
FRDI	flight research and development instrumentation
FRDR	flight readiness design review
FRE	flight-related element
FRE	format request element
FRF	flight readiness firing
FRFT	flight readiness firing test
FRG	Federal Republic of Germany
FRJD	forward reaction jet driver
FRL	frame reference line
FRL	fuselage reference line
FRM	facility requirements manager
FRP	fuselage reference plane
FRR	flight readiness review

FRRID	flight readiness review item disposition
FRSI	felt reusable surface insulation
FRT	flight readiness test
FRT	frequency response test
FS	factor of safety
FS	Freon servicer
FS	full scale
FS	functional schematic
FS	fuselage station
FS	fail safe
FS	fail to sync
FS	fault summary
FS	federal specification
FS	fire suppression
FS	fixed silo
FS	flight system
FS	fluid system
FS3	Future Security Strategy Study
FSA	final-stage acceptance
FSA	frequency standard assembly
FSAA	flight simulator for advanced aircraft

FSC	Fairchild Space Company
FSC	federal stock classification
FSCM	federal supply code for manufacturers
FSCP	fire sensor control panel
FSCP	flight support computer program
FSD	Flight Simulation Division (JSC)
FSD	full-scale development
FSD&P	flight systems design and performance
FSDU	frequency synthesizer and distribution unit
FSE	factory support equipment
FSE	flight simulation engineer
FSE	flight support equipment
FSED	full-scale engineering development
FSF	first static firing
FSGS	flare/shallow glide slope
FSH	fixed superhard
FSI	final systems installation
FSI	flight software integration
FSIM	functional simulator
FSIWG	Flight System Interface Working Group
FSK	frequency shift key

FSL	Flight Simulation Laboratory
FSL	Flight Systems Laboratories
FSLP	first Spacelab payload
FSLT	first sea-level test
FSM	Firmware Support Manual
FSM	fuel supply module
FSN	federal stock number
FSO	facility security officer
FSO	functional supplementary objective
FSP	fault summary page
FSP	flight safety plan
FSPL	free-space-path loss
FSR	final system release
FSR	final systems review
FSR	Flight Support Room
FSR	flight support request
FSRR	flight software readiness review
FSRR	flight system readiness review
FSRS	flight system recording system
FSS	field spectrometer system
FSS	fire suppression system

FSS	fixed service structure
FSS	flight support station
FSS	flight support structure
FSS	flight support system
FSS	flight systems simulator
FSS	frequency selective surface
FSS	full-scale station
FSSE	flight sensor stimuli equipment
FSSR	flight system software request
FSSR	flight system software requirements
FSSR	functional subsystem software requirements
FSSS	Future Strategic Systems Study
FSTE	factory special test equipment
FSTS	frequency standard test set
FSU	facility security office
FSU	factor of safety ultimate
FSU	Freon servicing unit
FSU	frequency synthesizer unit
FSV	flight space vehicle
FSW	flight software
FSY	factor of safety yield

FT	fast track
FT	fault tolerant
FT	feed-through
FT	fine tracker
FT	flight team
FT	flight test
FT	formal training
FT	functional test
FT&C	formal training and certification
FTA	fatigue test article
FTA	fault-tree analysis
FTA	flight test article
FTAM	file transfer, access, and management
FTC	flight test conductor
FTC	Florida Test Center (MDAC)
FTD	flight test directive
FTD	Foreign Technology Division, U.S. Air Force
FTE	factory test equipment
FTE	flight test engineer
FTE	forced test end
FTFD	field test force director (AFSCF)

FTIR	Fourier transform infrared
FTIS	flight test instrumentation system
FTMC	fault-tolerant memory control
FTO	flight test objective
FTO	Foreign Technology Office
FTO	functional test objective
FTOH	Flight Test Operations Handbook
FTP	flight test procedure
FTP	full-throttle position
FTP	functional test program
FTP	functional test progress
FTPF	Flight and Training Planning Facility
FTR	flight test requirement
FTR	functional test requirement
FTRD	flight test requirements document
FTRD	functional test requirements document
FTS	far-term study
FTS	far-term system
FTS	federal telecommunications system
FTS	flight telerobotic service
FTS	flight telerobotic servicer

FTS	flight termination system
FTS	flight test station
FTS	flight test system
FTS	functional test specification
FTT	field test telescope
FTVE	functional technology validation experiment
FU	flight unit
FUB	forward utility bridge
FUI	federal unemployment insurance
FUO	follow-up output
FUT	flight unit test
FV	flight version
FV	front view
FV	incremental change in velocity
FVDS	fuel vent and drain system
FVF	first vertical flight
FVSS	fuel vapor scrubber system
FVV	facility verification vehicle
FW	flag word
FW	fuel wasting
FWB	Fahrenheit wet bulb

FWC	filament-wound case
FWG	Facility Working Group
FWW	food, water, and waste
FWWM	food, water, and waste management
FWWMS	food, water, and waste management subsystem
FXR	flash X-ray
FY	fiscal year
G&A	general and administrative
G&C	ground rules and constraints
G&C	guidance and control
G&CEP	guidance and control equipment performance
G&CI	guidance and control integration
G&N	guidance and navigation
G&NS	guidance and navigation system
G-A	ground to air
G-G	ground to ground
G-II	Gulfstream II (Shuttle training aircraft)
G-MEM	GPC memory
G-V	gravity-velocity
G/A	ground to air
G/A/G	ground to air to ground

G/AIT	ground/airborne IGS terminal
G/C	guidance and control
G/E	graphite-epoxy
G/G	ground to ground
G/N	general notes
G/S	glide slope
G/T	gain versus temperature
G/T	ratio of antenna gain to receiver noise temperature
G/W	gateway
GA	glide angle
GA	ground antenna
GA	gyro assembly
GA&CS	ground acquisition and command station
GAC	ground attitude control
GAC	Grumman Aerospace Corporation
GACU	ground air conditioning unit
GACU	ground avionics cooling unit
GADG	gravity or acceleration due to gravity
GAEC	Grumman Aircraft Engineering Corporation
GAIN	graphic aids for investigating networks
GAO	General Accounting Office

GAP	GOAL automatic procedure
GAPL	group assembly parts list
GAS	getaway special
GASD	Government Aerospace Systems Division (Harris Corporation)
GASP	General Ascent Trajectory and Sizing Program
GASPI	gimbal angle, surface position indicator
GATE	generic automatic test equipment
GATP	ground acceptance test procedure
GATP	ground article test procedure
GATT	gate-assisted turnoff thyristor
GAX	GN&C annunciation interface
GBD	global burst detector
GBD	Government Business Division
GBI	Grand Bahama Island
GBL	government bill of lading
GBL	ground-based laser
GBOTV	ground-based OTV
GBR	glass bead rating
GBR	ground-based radar
GBS	ground-based software
GBSS	ground-based surveillance system

GBT	gyro bias calibration value
GC	gas chromatography
GC	gyrocompass
GC	gigacycle (1,000 megacycles)
GC	gimbal case
GC	ground computer
GC	ground contact
GC	ground control
GC	ground controller
GC	guidance computer
GC	guidance control
GCA	ground-controlled approach
GCA	guidance coupler assembly
GCC	ground communications coordinator
GCC	Ground Control Center
GCCC	Ground Control Computer Center
GCCO	ground control checkout
GCD	greatest common divisor
GCD	gyrocompass, desired cluster orientation
GCDC	ground checkout display and control
GCDS	ground checkout display and control system

GCE	GPS cargo element
GCF	greatest common factor
GCF	ground communications facility
GCHX	ground cooling heat exchanger
GCI	ground-controlled interception
GCID	ground computer interface device
GCIL	ground command interface logic
GCIL	ground control interface logic
GCILC	ground command interface logic controller
GCILU	ground control interface logic unit
GCL	ground control landing
GCL	ground coolant loop
GCN	GIRD change notice
GCN	ground communications network (A/G worldwide net)
GCN	ground control network
GCO	ground checkout
GCOS	general computer operational system
GCOS	ground computer operating system
GCP	ground command post
GCP	group command post
GCR	ground-controlled radar

GCR	group-coded recording
GCS	ground communications system
GCS	ground control station
GCS	guidance cutoff signal
GCTS	gas component test stand
GCTS	ground communication tracking system
GCU	general control unit
GCU	generator control (regulator) unit
GCU	ground cooling unit
GCU	gyro coupling unit
GDA	General Dynamics Astronautics
GDA	gimbal drive actuator
GDA	gimbal drive assembly
GDBS	generalized data base system
GDC	General Dynamics Corporation
GDC	gyro display coupler
GDCA	General Dynamics Convair Aircraft
GDDM	graphical data display manager
GDMS	generic data management system
GDMS	ground data management system
GDOP	geometric dilution of precision

GDP	generalized documentation processor
GDR	geophysical data record
GDS	Goldstone, California (STDN)
GDSD	Ground Data Systems Division
GDSM	ground data systems manager
GDSO	ground data systems officer
GDSSR	GDSD staff support room
GE	General Electric
GE-AESD	General Electric Aerospace Electronics Systems
GE/B	General Electric Burroughs
GEA	gimbal electronics assembly
GEC	General Electrodynamics Corporation
GEDAC	General Electric detection and automatic correction
GEM	generic electronics module
GEMS	general energy management system
GEMS	global emergency missile surveillance
GEO	geosynchronous Earth orbit
GEODSS	ground-based electro-optical deep-space surveillance
GEOMOD	geometric modeler
GEOPAUSE	geodetic satellite in polar geosynchronous orbit
GEOSEPS	geosynchronous solar electric propulsion stage

GERT	graphical evaluation and review technique
GESS	Goddard experiment support system
GET	ground elapsed time
GETI	ground elapsed time of ignition
GETL	ground elapsed time of landing (for TIG of abort burn)
GETS	ground equipment test set
GF	gauge factor
GF	government-furnished
GF&P	gases, fluids, and propellants
GFAE	government-furnished aeronautical equipment
GFAE	government-furnished aircraft equipment
GFD	government-furnished data
GFE	government-furnished equipment
GFERD	government-furnished equipment requirement description
GFI	government-furnished information
GFI	ground fault interrupter
GFM	government-furnished material
GFP	generalized filter program
GFP	government-furnished property
GFRP	glass-fiber-reinforced plastic
GFRP	graphite-fiber-reinforced plastic

GFS	government-furnished software
GFTM	generic fluids transfer model
GFY	government fiscal year
GG	gas generator
GG	gravity gradient
GGVM	gas generator valve module
GHA	general housekeeping area
GHA	Greenwich hour angle
GHC	ground half-coupling
GHE	ground handling equipment
GHX	ground heat exchanger
GHe	gaseous helium
GHz	gigahertz
GIA	general-purpose computer interface adapter
GIAG	Government-Industry Advisory Group
GIBIS	graphical issue-based information system
GIC	GPC interface console
GIDD	GSE interface definition document
GIDEP	government interagency data exchange program
GIDEP	government-industry data exchange program
GIDS	general-purpose interactive display system

GIE	ground instrumentation equipment
GIF	graphics interchange format
GIM	generalized information management
GIMADS	generic integrated maintenance and diagnostic system
GIMADS	generic integrated maintenance diagnostics
GIRD	ground integration requirements document
GISO	general industry safety order
GITG	Ground Interface Technical Group
GIWG	Ground Interface Working Group
GKS	graphics kernel system
GLAADS	gun low-altitude air defense system
GLC	generator line contractor
GLCM	ground-launched cruise missile
GLLD	ground locator laser designator
GLOW	gross lift-off weight
GLOW	ground lift-off weight
GLP	GOAL language processor
GLS	ground launch sequencer
GM	gaseous mixture
GM	geometric mean
GM	ground mobile

GMAL	General Electric Macro Assembly Language
GMAW	gas metal arc welding
GMCC	Ground Mobile Control Center
GMCL	ground measurements command list
GME	gimbal module electronics
GMEM	GPC memory
GMF	ground module force
GMIL	KSC STDN station
GMIP	government mandatory inspection point
GMIS	ground STDN management information system
GMIS	GSSC management information system
GML	general measurement loop
GMLCC	Ground Mobile Launch Control Center
GMM	geometrical math model
GMN	Gorman (TACAN station)
GMT	Greenwich mean time
GN	ground network
GN&C	guidance, navigation, and control
GN&CS	guidance, navigation, and control subsystem
GNC	guidance and navigation computer
GNC	guidance, navigation, and control

GNCFTS	GN&C flight test station
GNCIS	GN&C integration simulator
GNCS	guidance and navigation control system
GNCSIM	GN&C simulation
GNCTS	GN&C test station
GNE	guidance and navigational electronics
GNIC	G&N indicator control
GNP	gross national product
GNS	guidance and navigation simulator
GNS	guidance navigation system
GO	general order
GOAL	ground operations aerospace language
GOASEX	Gulf of Alaska Seasat Experiment
GOC	ground operations coordinator
GOCA	ground operations control area
GOCO	government-owned, contractor-operated
GOE	ground operating equipment
GOE	ground outfitting equipment
GOES	geostationary operational environment satellite
GOES	geosynchronous operational environmental satellite
GOM	KSC ground operations manager at DFRF or WSMR

GOMMS	ground operations and material management system
GOMS	ground operations management system
GOP	Ground Operations Panel
GOP	ground operations plan
GOPG	Ground Operations Planning Group
GOR	ground operations review
GORD	ground operations requirements document
GORP	Ground Operations Review Panel
GORP	ground operations requirements plan
GORR	ground operation readiness review
GORS	ground observer RF system
GOS	ground operations system
GOSP	ground operational support plan
GOSRP	ground operational support requirements plan
GOSS	ground operational support system
GOTS	government off the shelf
GOWG	Ground Operations Working Group
GP	general publication (KSC)
GP	general-purpose
GP	government property
GPA	general-purpose amplifier

GPAS	general-purpose airborne simulator
GPBIM	general-purpose buffer interface module
GPC	gel permeation chromatograph
GPC	gel permeation chromatography
GPC	general-purpose computer
GPC	gyro pulse count
GPCB	GOAL program control block
GPCIPL	general-purpose computer initial program load
GPD	gimbal position display
GPI	gimbal position indicator
GPI	ground position indicator
GPIO	general-purpose input and output
GPL	general-purpose laboratory
GPL	GOAL processing language
GPME	general-purpose mission equipment
GPNDS	global positioning and nuclear detection system
GPO	Government Printing Office
GPRN	GOAL test procedure release notice
GPRP	government production research property
GPS	general processing subsystem
GPS	Global Positioning System (Navstar)

GPS	ground power supply
GPS	ground processing simulation
GPS	RX GPS user receiver
GPSCP	GPS computer program
GPSS	general-purpose simulator system
GPSS	general-purpose system simulator
GPTE	general-purpose test equipment
GPU	ground power unit
GPUR	GOAL test procedure update request
GPVS	general-purpose visual simulator
GR	ground rule
GRACE	ground radar calibration equipment
GRC	Glenn Research Center
GRD	ground detector
GRE	Gamma Ray Explorer
GRID	graphic retrieval and information display
GRNC	group not counted
GRO	Gamma Ray Observatory
GRS	global receiving system
GRTLS	glide return to launch site
GS	gas servicer

GS	generalized system
GS	glide slope
GS	ground speed
GS	ground station
GS	ground system
GS	II Generalized System II
GSA	General Services Administration
GSAT	geosynchronous satellite
GSCU	ground service cooling unit
GSDL	Ground Software Development Laboratory
GSDS	Goldstone duplicate standard (standard DSIF equipment)
GSE	government support equipment
GSE	ground servicing equipment
GSE	ground support equipment
GSE&I	general systems engineering and integration
GSEL	ground support equipment list
GSERD	ground support equipment recommendation data
GSF	gyro scale factor
GSFC	Goddard Space Flight Center
GSI	glide slope indicator
GSI	government source inspection

GSIG	Ground Systems Integration Group
GSIU	ground standard interface unit
GSLS	ground station link survivability
GSO	Ground Support Office
GSO	ground support operations
GSO	ground systems operations
GSP	ground safety plan
GSP-R	guidance signal processor-repeater
GSPF	Ground Software Production Facility (LPS) (FR 2 KSC)
GSPO	Ground Systems Project Office (JSC)
GSR	galvanic skin response
GSS	geosynchronous space station
GSS	government systems sector
GSS	ground support software
GSS	ground support system
GSSC	General Systems Simulation Center (NASA)
GSSC	ground support simulation computer
GSSF	general service stock fund
GSSI	ground support system integration
GSSI&C	ground support systems installation and checkout
GSSI&C	group support systems integration and checkout

GST	ground system test
GSTAR	Saudi Arabian communications satellite
GSTDN	ground space flight tracking and data network
GSTDN	ground spacecraft tracking and data network
GSTP	ground system test procedure
GSTS	ground-based surveillance and tracking system
GSTS/BM	ground-based surveillance and tracking sagement
GSU	gas servicer unit
GSV	glove stop valve
GSVOO	ground station visibility of orbiting objects
GSVP	ground support verification plan
GT	ground team
GT	ground test
GT	gyro torque
GT&A	ground test and acceptance
GTA	gas tungsten arc
GTA	ground test access
GTA	ground test article
GTA	ground test assembly
GTA	ground torquing assembly
GTAW	gas tungsten arc welding

GTC	glycol trim console
GTC	ground test conductor
GTCU	ground thermal conditioning unit
GTE	General Telephone and Electronics
GTF	ground test facility
GTI	Grand Turk Island
GTI	ground test instrumentation
GTLV	government-furnished target launch vehicle
GTM	ground team manager
GTM	ground test missile
GTM	ground test motor
GTO	generic technical order
GTO	geosynchronous transfer orbit
GTP	general test plan
GTRI	Georgia Tech Research Institute
GTS	general test support
GTS	GN&C test station
GTS	GNS test station
GTS	guidance test station
GTT	group technology time
GTU	glycol trim unit

GTV	ground test vehicle
GTV	ground transport vehicle
GTVI	gimbal angle and translational velocity indicator
GUCP	ground umbilical carrier plate
GUIDO	guidance officer
GUL	GSE utilization list
GUSB	guided, unified S-band
GVL	Ground Vibrations Laboratory
GVO	Gaviota (TACAN station)
GVSC	generic VHSIC spacecraft computer
GVT	ground vibration test
GVTA	ground vibration test article
GW	gateway
GW	gross weight
GWA	general work area
GWM	Guam (STDN)
GWT	ground winds tower
GYM	Guaymas, Mexico (remote site)
GaAs	gallium arsenide
GeV	giga electron volt
Gr/Al	graphite-aluminum

Gr/Ep	graphite-epoxy
H	altitude
H	altitude rate
H	hazardous (task classification)
H	henry (SI unit)
H	momentum
H&D	hardened and dispersed
H&K	homing and kill
H-CITE	horizontal cargo integration test equipment
H-S	Hamilton Standard
H-S	horizon scanner
H-S	horizon sensor
H/A	hazardous area
H/B	hyperbaric
H/C	head count
H/E	heat exchanger
H/F	human factor
H/L	hardline
H/O	handover
H/S	heat shield
H